Bipolar Mood and Weather: A Light Log of Pressure, Temperature and Sun

Updated 3 October 2026

At a glance

A 2017 study of meteorology and mood in bipolar disorder reports that daily maximum temperature was the only meteorological variable to predict clinically relevant mood change.
The Danish study of climatic factors and bipolar episodes found no correlations between the onset of bipolar episodes and any meteorological parameters.
A systematic review of seasonality in bipolar disorder reports manic episodes peaking in spring and summer and depressive episodes in early winter.
This guide covers what the studies report, three weather lines, sleep and activity, a weekly review, seasonal history, a weak match, contact signs and visit questions.
Bipolar Journey keeps weather as external factors alongside mood, sleep and medicine entries, with flagged days and weekly and monthly views in one dated history.

Weather is easy to watch and hard to interpret. A log that tracks every forecast can take over the day, while a log with three weather lines and one weekly review answers the question with your own dates.

This guide covers what four studies report about temperature, pressure and mood in bipolar disorder, which weather lines to keep, how sleep and activity fit, how to run a weekly review, how to use past episodes by month, what a weak match means, which mood shifts call for a clinician and what to bring to a visit. Each section ends with how Bipolar Journey (by Health Journey Labs) keeps that part of the record.

Temperature, pressure and sun against bipolar mood: what four studies report

Weather and bipolar mood have been studied for years, with mixed results. A 2017 study of meteorology and mood in bipolar disorder compared daily self-reported mood with atmospheric pressure, hours of sunshine, relative humidity and daily maximum and minimum temperatures. It reports that daily maximum temperature was the only meteorological variable to predict clinically relevant mood change, with increases in temperature associated with greater odds of a transition into manic mood states, and it lists a small sample size among its limitations.

The Danish study of climatic factors and bipolar episodes examined patients with at least three previous hospitalizations every 3 months for up to 3 years. It found no correlations between the onset of bipolar episodes and any meteorological parameters, and concluded that weather factors do not constitute a dominant cause.

In the rapid cycling study of mood and weather, outpatients completed twice-daily mood self-ratings for 3 consecutive months. The best-fitting model for the largest number of individuals coupled temperature to mood, with no effect of barometric pressure or cloud cover, and it did not fit every individual.

The common thread is individual variation. Pressure shows little in these studies, temperature shows more, and each person's record is the only place to see which applies.

Which weather lines are worth the effort? In Bipolar Journey, the Daily check-in keeps external factors together with mood, sleep and meds on the same date, and Custom symptoms let you add your own weather labels. After several weeks, the history shows whether temperature, pressure or neither lines up with your harder days.

Maximum temperature, pressure, and sunshine: three weather lines for a light bipolar disorder log

A weather log can grow until it competes with the thing it is meant to explain. Three lines are enough to test the question, and all three come from a local weather source:

Temperature, pressure and sunshine

Bipolar Journey writes the daily maximum temperature first.

☐ Daily maximum temperature, the first number to write down.
☐ Atmospheric pressure, as the weather source reports it, with a note when it moved a lot over the day.
☐ Sunshine or cloud, in one word such as bright, mixed or gray.

From Bipolar Journey, we recommend adding the three lines in one pass, as external factors in the daily record, and leaving other weather detail out. Humidity, wind and rainfall can be added later if a clinician or the record points to them.

Weather is looked up from the source. Writing the number from the source keeps the entry separate from your mood on that day, so the two can be compared later without one coloring the other.

The mood side of the pair matters more than the weather side. Keep the usual mood, energy and sleep lines, as described in How to Start Tracking Sleep and Mood in Bipolar Disorder.

With Bipolar Journey, weather goes into the Daily check-in as external factors, or as Custom symptoms with your own labels, alongside the physical symptoms, emotional state, nutrition, sleep, exercise and meds entries. The calendar view colors days by intensity, so a hot or low-pressure day can be found on the same page as the days around it.

Sleep hours and activity logged with weather: the lines a 2017 bipolar disorder study tested

The 2017 study also investigated sleep and activity as mediators between weather and mood. It reports that they suggest at least partial influence on the prospective relationship between maximum temperature and mood. Sleep and activity may therefore carry part of the link between a hot day and a mood change.

That is a reason to record sleep and activity on the same line as the weather. Keep them as facts (Bipolar Journey checklist):

Sleep hours, activity and medicines

Bipolar Journey adds these so weather is not the only explanation.

Sleep hours for the night before, as you measured them.
How the night went, in a few words.
Activity that day, such as a long walk, a busy errand day or a quiet day at home.
Medicines taken as prescribed, as dated facts.

The record then lets a clinician look at weather, sleep and activity together, and at the mood that followed. For the sleep side in more detail, see How Short Sleep Affects Mood the Next Day in Bipolar Disorder.

The Daily check-in in Bipolar Journey records sleep, exercise and meds in the same pass as mood, and My Meds keeps medicine names and timing for the options you already take as prescribed. Read against sleep hours and next-day mood, a hot or low-pressure day becomes one entry among several rather than a verdict on its own.

One weekly review instead of daily checking: keeping a weather log light with bipolar disorder

The NIMH bipolar disorder publication states that mood episodes cause symptoms that last a week or two, or sometimes longer, and that during an episode the symptoms last every day for most of the day. A time scale of weeks suits a weekly review better than a daily one.

A weekly review has a fixed shape:

One weekly review instead of daily checking

Bipolar Journey opens the weekly view once, on the same day.

Open the weekly view once, on the same day each week.
Look for days that stand out in mood, energy or sleep.
Check the three weather lines for those days only.
Write one sentence about what matched and what did not.
Close the view and return to the usual entries.

Days with no weather match are worth a line too, because a log that records only matches overstates them. The NIMH publication also lists keeping a life chart or mood journal to help recognize mood swings.

For the days that stand out, flag them when they happen. A flag takes the place of rereading the whole log.

The Flare Tracker flags a day clearly worse than a usual week, such as a mood rise, a wired short-sleep stretch or a low-energy day that stands out. In Bipolar Journey, the weekly and monthly views color days by intensity, so the review starts from the flagged days and the weather lines are checked only for them.

Past bipolar episodes by month: the seasonal history a clinician can use

The systematic review of seasonality in bipolar disorder identified 51 papers, of which 32 addressed hospitalization rates by season. It reports that manic episodes peak during spring and summer and, to a lesser extent, in autumn, and that depressive episodes peak in early winter and, to a lesser extent, summer. It also reports a high frequency of seasonal patterns for manic episodes (15%) and depressive episodes (25%). The NIMH publication adds that many people with bipolar disorder experience seasonal worsening of depression in the winter.

These are group findings. Your own history is the test. Build a month-by-month list from what you know:

Past episodes by month

Bipolar Journey lists the month and type of each past episode.

The month and year of each past mood episode.
Whether it was a high, a low or mixed.
How long it lasted, in days or weeks.
What the weather and daylight were doing at the start, if you remember.

Mark entries you are unsure about as unsure. Going forward, the daily record adds exact dates. See What to Log Between Bipolar Hard Weeks Beyond One Mood Score for what to log between hard weeks.

The monthly view in Bipolar Journey colors days by intensity, so a year of entries shows which months held the harder stretches. The Daily Journal takes free-text or voice notes, which suits writing down what an earlier episode looked like and when it began.

A weak weather match in a bipolar disorder log: how to read it and what to keep logging

The rapid cycling study found that its best model was not the best fit for every individual, which points to substantial individual differences in how weather and mood are linked. The Danish study found no correlation between weather and the onset of episodes. A log that shows a weak match is therefore a normal result.

Three outcomes are possible after several months:

A repeated match, a mixed result or no match

Bipolar Journey explains what to bring in each case.

A repeated match, such as harder days on several of the hottest days. Bring the dates to a visit.
A mixed result, where some hot days matched and others did not. Keep the three lines and keep the review.
No match. Drop the weather lines and keep sleep, mood and medicines, which carry the mood record.

Whichever outcome appears, the record is useful, because it answers the question with your own dates. A tight log with three weather lines and a weekly review reaches an answer without more effort than that.

Read together in Bipolar Journey, the daily entries and the flagged days from the Flare Tracker show whether hot or low-pressure days cluster with harder days or are scattered among calm ones. Insights can strengthen as the shared history grows, and Custom symptoms can be removed from the routine when the match stays weak.

Bipolar disorder: contact a clinician for racing thoughts, little sleep, or hopelessness

The NIMH bipolar disorder publication lists symptoms of a manic episode that include feeling very up or extremely irritable, racing thoughts, decreased need for sleep, talking fast, excessive appetite for pleasurable activities and difficulty maintaining work responsibilities. It lists symptoms of a major depressive episode that include feeling very down or anxious, trouble concentrating or making decisions, lack of interest in almost all activities, being unable to do even simple things, and feeling hopeless or worthless.

A weather match never decides whether a shift needs a call. Contact a clinician when mood, energy or sleep change quickly or worry you, whatever the forecast. If there is danger to your safety, call your local emergency number (for example 911) or a crisis line where you live (for example 988).

After the call, the record helps. Note:

First facts when symptoms shift

Bipolar Journey dates the shift and what changed first.

☐ The date the shift began and what changed first.
☐ Sleep hours over the last several nights.
☐ Medicines in use, as dated facts.
☐ The weather lines, last, as one more item.

The Flare Tracker records onset, intensity and a short note for a mood rise or a low-energy day that stands out, and the Daily check-in in Bipolar Journey holds sleep, mood and medicine entries from the days before. Help comes first; the entries are ready for the clinician afterward.

Taking a weather log to a bipolar disorder visit: dates, sleep lines, and questions

A clinician has limited time. The weather log earns space only when it comes with the mood, sleep and medicine lines. Bring one page:

Taking a light weather log to a visit

Bipolar Journey brings the dates of the harder stretches.

☐ The dates of the harder stretches in the last several months.
☐ Sleep hours and activity around those dates.
☐ The three weather lines for the same dates, plus the result of the weekly review.
☐ The dated medicine list.
☐ The month-by-month history of past episodes.

Visit questions take one form, Is it worth reviewing the harder stretches and the weather lines together? Is it worth reviewing the sleep lines around the hottest weeks together? Is it worth reviewing the month list of past episodes together?

The NIMH publication states that bipolar disorder is diagnosed based on the severity, length and frequency of symptoms and experiences over a lifetime, so dated history is the material a clinician reads.

The Doctor Report in Bipolar Journey exports a one-page summary of dates, sleep and mood context and how you functioned. My Care Team holds clinicians and short visit notes for what to ask and bring, notes during the visit and the review afterward, and the AI companions can help word the questions from the logged history.

How Bipolar Journey can help

A paper notebook handles a three-line weather log well, as long as every line has a date. When weather, sleep, mood and medicine entries need to be read together across months, an app keeps them in one history; Best Bipolar Apps 2026 compares the options.

Bipolar Journey is a personal bipolar tracker from Health Journey Labs on the App Store and Google Play. It lets you add weather as external factors alongside mood, sleep and meds, flag the days that stand out and review them weekly. The shared history shows whether weather lines up with your harder days or whether sleep and medicines tell more. Below is what you can use and how each part helps.

Daily check-in — A guided daily form for physical symptoms, emotional state, nutrition, sleep, exercise, meds and external factors, read against the rest of the logged history.
Daily Journal — Free-text and voice notes on what the short night cost, partner asks, visit debriefs, guilt after a canceled plan and fear around a fast day.
Flare Tracker — Marks a day clearly worse than a usual week, such as a mood rise, a wired short-sleep stretch or a low-energy day that stands out, so one-off rises separate from repeating patterns.
My Meds — Medicine names and timing for the options you already take as prescribed, read against sleep hours and next-day mood.
My Assessments — Structured check-ins beyond the daily scores, plus life and social context from onboarding.
Learn — Short education topics and prompts on sleep, mood, routines and visit preparation.
AI companions — Clara for general chat plus knowledge, fitness, nutrition and relationship companions, all able to see the logged history; useful for visit wording, a calm partner script, a soft rain-check line or a listening ear after a hard night.
Weekly Goals — One small aim for the week and a record of whether it held, read against real check-ins.
Doctor Report — A one-page summary exported from the logged history: dates, sleep and mood context, and how you functioned.
My Care Team — Clinicians and short visit notes, used to prepare what to ask and bring, to write notes during the visit and to review afterward.
My Labs — Result dates for blood counts, levels and other tests, read against sleep, mood and function.
Period Tracker — Start and stop dates, flow and how heavy or light bleeding felt, read against sleep, mood and energy.
Food Tracker — Meal or drink lines, including caffeine and alcohol, read against sleep and mood.
Weight Tracker — Scale readings or body notes.

Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.

We make Bipolar Journey at Health Journey Labs. This guide is educational and does not replace medical advice. Diagnosis, medication decisions, and urgent care decisions belong with your treating clinicians.

Sources

FAQ

The answers below draw on the sources cited in this guide, and the app they mention is Bipolar Journey (by Health Journey Labs).

Does weather affect bipolar mood?

The studies disagree. One reports that higher daily maximum temperature predicted a move toward manic mood, another found no link between weather and the onset of episodes, and a rapid cycling study found wide individual differences between participants.

The history in Bipolar Journey holds weather as external factors together with mood, sleep and meds, so your own dates show whether any weather line lines up with your harder days or stays unrelated to them.

Does barometric pressure change bipolar symptoms?

In the rapid cycling study, the best model for most individuals showed no effect of barometric pressure or cloud cover, while temperature coupled to mood. Pressure earns one line in a log, and temperature is the better first comparison.

Bipolar Journey lets you add pressure as a Custom symptom or an external factor, and the weekly review then shows whether the days that stood out also had large pressure moves on the same dates.

Which weather details are worth logging?

Keep three lines: daily maximum temperature, atmospheric pressure from a local weather source, and a one-word note for sunshine or cloud. The 2017 study found maximum temperature the most informative of the variables it tested.

The Daily check-in in Bipolar Journey records external factors on the same date as mood, sleep and meds, which keeps the three weather lines attached to the days they describe and easy to find later.

How do I keep a weather log from taking over?

Fix the log at three weather lines and one weekly review on the same day each week. Check the weather only for days that stood out in mood, energy or sleep, and leave the other days alone.

The Flare Tracker in Bipolar Journey flags days clearly worse than a usual week, so the weekly review starts from those flags instead of from rereading every entry in the history one by one.

How do I tell weather effects from sleep effects?

The 2017 study found that sleep and activity partly mediated the link between maximum temperature and mood, so the two are tangled together. Each date therefore gets sleep hours and activity alongside its weather lines.

Bipolar Journey keeps sleep, exercise and meds in the same daily record as external factors, so a clinician can read all of them together across weeks and ask about the dates that stand out.

Do I have a seasonal pattern in my bipolar episodes?

A systematic review reports that manic episodes peak in spring and summer and depressive episodes in early winter, but those are group findings. A month-by-month list of your own past episodes is the real test.

The monthly view in Bipolar Journey colors days by intensity, so a year of entries shows which months held the harder stretches and roughly how long each of them lasted, month after month.

What if my log shows no weather match at all?

That is a usable result. It means the weather lines can come out of the routine, and sleep, mood and medicine entries remain the material a clinician reads at a visit with dates attached.

Bipolar Journey lets you drop Custom symptoms from your routine while the rest of the history stays intact, so the log gets lighter without losing continuity or the earlier weather entries from past weeks.

When does a mood shift need a call, whatever the weather?

Contact a clinician when mood, energy or sleep change quickly or worry you. NIMH lists racing thoughts, decreased need for sleep and feeling hopeless among symptoms of episodes. If there is danger, call your local emergency number (for example 911) or a crisis line where you live (for example 988).

The Flare Tracker in Bipolar Journey records onset, intensity and a short note, so when you do call, the dates and details of the change are already written down for the conversation with the clinician.

What should I bring to a visit about weather and mood?

Bring one page: dates of harder stretches, sleep hours and activity around them, the three weather lines, the dated medicine list and the month list of past episodes. Questions work best in the form Is it worth reviewing these dates together?

The Doctor Report in Bipolar Journey exports a one-page summary of dates, sleep and mood context and how you functioned, so the visit starts from dated facts instead of from memory, and the page is quick to read.

Where do medicines fit in a weather log?

List medicines as dated facts: the name, the first date, and any date a clinician updated the plan. Decisions about any medicine stay with the clinician who prescribes it, whatever the weather lines show.

My Meds in Bipolar Journey records medicine names and timing for the options you already take as prescribed, read against sleep hours and next-day mood across all the weeks of the log, so the list stays factual.

Can an AI chat help me read my weather and mood log?

An AI chat can help organize notes and word questions. A clinician interprets the pattern, so treat any answer as a list of items to raise and check each one against your own dated entries.

The AI companions in Bipolar Journey, including Clara for general chat, already see the logged history, so questions about weather start from your real entries and dates instead of from a blank page.

Are hot days worth flagging on their own?

The 2017 study found temperature the most informative weather variable, but it also lists a small sample size as a limit. Flag hot days that stand out in mood, energy or sleep, and note the sleep hours with them.

The Flare Tracker in Bipolar Journey marks a day clearly worse than a usual week, and the shared history then shows whether flagged days repeat on the hot ones or scatter among cooler days.

How do I log weather when I travel?

Use the weather source for the place you were that day, and add a note about the trip, since sleep and routine change with travel. The same three lines keep the log comparable with the weeks at home.

The Daily Journal in Bipolar Journey takes free-text or voice notes for trip details, and the Daily check-in holds sleep and mood for the same dates, so travel weeks stay readable alongside the weeks at home.

How do I keep privacy in check with my health log?

Mood entries, sleep hours and notes from a hard week can be read out of context by someone who was not there. Keep the log behind a passcode, avoid shared devices, and agree with your clinician or a trusted person on what you share and when.

In Bipolar Journey, the entries are your own health notes. The app's privacy policy explains how data is stored and handled, so read it before you add sensitive details. This article is general information and not medical advice.