Updated 3 October 2026
At a glance
- A 2024 survey of 484 women found the evidence linking weather to menstrual symptom severity to be limited and inconclusive (PubMed).
- Symptoms are recorded for at least two cycles, because they can vary from cycle to cycle (AAFP).
- Four weather details cover the question: temperature, humidity, rain and air pressure, written on the same line as the cycle day.
- A fixed rule for when to stop weather notes keeps the record short and the comparison fair.
- PMDD Journey stores weather words in the Daily Journal and the Daily check-in, so each weather note stays on the date of the mood and energy scores.
Some people with PMDD notice that a hard luteal day was also a hot, damp or stormy day. The thought returns with every forecast, and the weather check becomes one more daily task.
This guide sets a limit. It lists the four weather details worth recording, the cycle dates that go with them, a two-cycle trial, a rule for stopping, and the three lines to bring to a clinician.
Weather and PMDD: temperature, humidity, rain, and pressure
Weather has many measurable parts. For a PMDD record, four are enough: temperature, humidity, rain, and air pressure when a weather service reports it. Each is written as a plain value or a plain word, such as “hot”, “damp”, “rain all day” or “pressure falling”.
- Temperature: the day's high, or a word such as cold, mild or hot.
- Humidity: dry, damp or very humid.
- Rain: none, light or heavy.
- Pressure: rising, steady or falling, using the wording of the weather source.
The research base is small. A 2024 cross-sectional survey of 484 women in Saudi Arabia concluded that scientific evidence for a link between weather and menstrual symptom severity is still limited and inconclusive, although some women perceive a connection (PubMed). A short fixed list tests the idea against your own dates without adding work. It also keeps the entry factual: “humid, 31 degrees” can be compared across cycles, while “the air felt heavy” cannot.
From PMDD Journey (by Health Journey Labs), we recommend writing the four weather words once, in the evening, and leaving them unchanged afterward. An entry made later in the week records the memory of the weather instead of the weather.
Weather words go into the Daily Journal as free text, and the Daily check-in has an external factors entry for the same purpose. PMDD Journey keeps those words on the same date as the mood, irritability, anxiety and energy scores, so a damp day and a high irritability score are already on the same date when you look back.
Cycle day, period start, and PMDD symptom onset: what each weather line needs
A weather note has no meaning without its cycle day. Premenstrual symptoms typically start one to two weeks before a period (MedlinePlus), so the same rainy Tuesday means one thing on cycle day 9 and another on cycle day 24. The guide on how long PMDD symptoms last before the period explains how to date the start and end of that window.
Mayo Clinic describes the dates a clinician looks for: the day symptoms are first noticed, the day they disappear, and the days the period starts and ends (Mayo Clinic). These 4 dates frame every weather line.
Table of weather at symptom onset, by PMDD Journey
| Item | Example entry |
|---|---|
| Cycle day | Day 23 |
| Weather words | Hot, very humid, no rain, pressure falling |
| Main symptoms | Irritability 4 of 5, tearful in the afternoon |
| Other facts of the day | Late meeting, two coffees |
The example separates weather from the other facts of the day. A late meeting and two coffees are logged on the same line, so a later review can ask whether the weather or the day itself matches the symptom. Two habits keep the table useful. First, the cycle day is counted from the first day of bleeding, the same way in every cycle. Second, the symptom score uses one scale for the whole trial, so a 4 in cycle 1 and a 4 in cycle 2 mean the same thing.
The Period Tracker holds the start and stop dates, and PMDD Journey places the cycle day on each Daily check-in entry. The Daily Journal adds the weather words, which means the day's weather, the cycle day and the symptom scores are read together from one dated history.
A two-cycle weather trial with PMDD: the dates to compare before drawing a conclusion
Symptoms vary from cycle to cycle, so clinicians ask for records over at least two cycles (AAFP). The same length suits a weather question. The AAFP reports that PMS affects approximately 20% to 30% of women, with about 2% to 5% reporting symptoms severe enough to meet the diagnostic criteria of PMDD, so the diary is the tool that separates the two. One cycle can contain a storm and a bad week by coincidence. Two cycles show whether the overlap repeats.
The AAFP also names the Daily Record of Severity of Problems, a validated survey tool, as one way to identify a cyclic pattern. A weather line is an addition to that kind of diary, not a replacement for it.
The steps are listed below. The guide to starting PMDD tracking covers the basic daily entries that the weather line is added to.
A two-cycle weather trial
PMDD Journey writes four weather words and scores daily.
- Cycle 1: write the four weather words and the symptom scores every day.
- Between cycles: list the five worst symptom days and the five calmest days, each with its cycle day and weather words.
- Cycle 2: repeat the same daily lines without changing the wording.
- After cycle 2: compare the two lists. If the worst days share weather words but not cycle days, that is a pattern worth showing. If they share cycle days, the cycle timing explains more.
The comparison uses the same words in both cycles, which keeps it fair (PMDD Journey checklist).
Seen in the weekly and monthly views, days colored by intensity show where the five worst days fall. PMDD Journey keeps both cycles in one history, and the Flare Tracker marks any day clearly worse than a usual week, so the worst-day list can be built by scrolling through flagged days with their weather words.
Follicular-phase days with the same weather: the PMDD comparison that matters
A weather link needs a control. The most useful control is a day with similar weather in the follicular phase, the first half of the cycle after the period.
Cycle phase changes how people with premenstrual symptoms feel on their own. In a laboratory study of women with severe premenstrual syndrome, current mood state, quality of life, fatigue and perceived stress were further worse in the late-luteal phase than in the same women's follicular phase, while those measures did not change across phases in the control group (PMC). Late-luteal days can therefore look worse for reasons that have nothing to do with the sky.
The record answers the question in two steps:
Follicular days with the same weather
PMDD Journey finds days with matching weather in different phases.
- Find three or more days with the same weather words, such as hot and humid, in different phases of one cycle.
- Write the symptom scores of those days together with their cycle days. If the follicular days stay calm and the late-luteal days do not, the cycle phase fits better than the weather.
Three or more matching days is a working minimum for this comparison. With fewer, write “not enough matching days” and keep logging into the next cycle.
If the follicular days are also rough, the weather note deserves a place in the visit summary.
The Daily check-in in PMDD Journey records mood, irritability, anxiety, sleep, energy and cycle day, so a hot follicular day and a hot late-luteal day can be set against each other on the same scales. Reading the calendar view shows both days with their colors, which answers the comparison without a spreadsheet.
Stop rules: when a weather note adds nothing to a record of PMDD
Weather notes can turn into daily checking of forecasts, radar and pressure readings. A stop rule limits the work and is decided before the trial starts.
Stopping the weather line after two cycles
PMDD Journey keeps one source and one reading per day.
- One weather source and one reading per day, written in the evening.
- No weather lookups on days when no symptoms are logged.
- No new weather categories during the trial. Added categories make cycle 1 and cycle 2 impossible to compare.
- Stop the weather line after cycle 2 when no weather words repeat on the worst days.
A stopped weather line is a result, and it is reached by the rule rather than by mood on a given day. The cycle dates and symptom scores continue, and the review reads: “No weather overlap in two cycles.” That sentence is also useful to a clinician, because it removes one question from the list.
If the checking itself feels hard to stop, or the anxiety about the forecast becomes a regular symptom, that belongs in the log as its own entry with its cycle day. Mention it at the visit, since AAFP lists anxiety among the symptoms of premenstrual disorders (AAFP).
Anxiety about forecasts can be added as a label through Custom symptoms in PMDD Journey, and the Daily Journal keeps the sentence “No weather overlap in two cycles” on the date it was written. Both entries stay in the history, so a stopped weather line is still a documented decision.
Food, caffeine, alcohol, work, and travel on weather days with PMDD
A hot, humid day often comes with other changes: a skipped meal, extra iced coffee, a late night out, a long commute or a trip. When several facts share a date, weather gets blamed for all of them.
The practical fix is a short list of other facts for each worst day. Write only items that happened:
Checklist of context on weather days, by PMDD Journey
- ☐ Meals and drinks, including caffeine and alcohol.
- ☐ Work or household strain, such as a deadline or a long shift.
- ☐ Travel, including a change of climate or time zone.
- ☐ Medicines and supplements already in use, as dated facts.
Mayo Clinic advises keeping a record to identify the triggers and timing of symptoms (Mayo Clinic). Several daily facts are recorded together, so that none is chosen as the cause in advance.
From PMDD Journey, we recommend writing the other facts first and the weather last. The order prevents the weather from becoming the default explanation.
The Food Tracker records meal or drink lines, caffeine and alcohol, and My Meds keeps medicine names and start dates. With PMDD Journey these entries are kept in the same history as the weather words, so a rough humid day can be checked against the coffee, the meeting and the medicine list from that date.
Three weather lines about PMDD for the clinician
A clinician has limited time and wants timing first. The AAFP describes premenstrual syndrome as primarily diagnosed clinically, from consistent characteristic symptoms in the luteal phase that resolve during menstruation or within the following week (AAFP). Weather belongs after timing, in no more than three lines:
Three weather lines for a visit
PMDD Journey starts with cycle timing.
- Cycle timing: dates of symptom onset, peak days and the first day of each period for the last 2 cycles.
- Weather result: “Worst days shared hot and humid weather in 3 of 5 cases” or “No weather overlap in two cycles”.
- Other facts: the main daily changes on the worst days, such as travel or a work deadline.
Mayo Clinic lists a question that doctors commonly ask: whether anything seems to make symptoms better or worse (Mayo Clinic). The weather line answers it with dates instead of a general impression. The guide to preparing for a short PMDD doctor visit covers how to fit these lines into a few minutes of appointment time.
Question to bring: “Is it worth reviewing the weather days together with the cycle dates?” The clinician decides what follows, and the answer is written in the visit notes.
The Doctor Report in PMDD Journey exports a one-page summary of cycle dates, mood and irritability, anxiety, sleep, energy and function from the logged history. My Care Team holds short visit notes, so the answer to the clinician's question about better or worse days is written down while the visit happens.
How PMDD Journey can help
A paper diary and a phone note both work for a two-cycle trial. An app adds one advantage: the cycle day, the symptom scores and the weather words stay together, and the best PMDD apps 2026 comparison at Best PMDD Apps 2026 lists what each tracker records.
PMDD Journey is a personal PMDD tracker from Health Journey Labs on the App Store and Google Play. For this angle, it lets you write four weather words with every cycle day and compare the worst days across two cycles. At the end of the trial, the same history shows whether the weather line earns a place in the record. Below is what you can use and how each part helps.
- Daily check-in — Daily scores for physical symptoms, emotional state, nutrition, sleep, exercise, meds and external factors, plus mood, irritability, anxiety, energy and cycle day, read against the rest of the history.
- Daily Journal — Free-text and voice entries for the weather words, cycle-day context, what the day limited, work strain and visit debriefs, which add context to the scores.
- Flare Tracker — Flags a day clearly worse than a usual week, such as sharp irritability or an anxious spell, and shows whether it was a single rise or part of a repeating pattern.
- My Meds — Medicine and supplement names, timing and start dates, including changes your clinician made, read with mood, sleep and cycle weeks.
- My Labs — Result dates for tests ordered to rule out other causes, such as blood counts, thyroid and iron, read with mood, symptoms by cycle day and function.
- Weekly Goals — One small aim for the week and whether it held, read against the real check-ins.
- Learn — Short education topics on luteal-phase symptoms, cycle timing, sleep, tracking across two cycles and visit preparation, read with your own logged weeks.
- AI companions — Clara for general chat and specialist companions for knowledge, fitness, nutrition and relationships, all of which see the logged history and can help word a visit question.
- My Care Team — Clinicians and short visit notes, with space for what to ask and bring, notes during the visit and a review afterward.
- Doctor Report — A one-page summary exported from the logged history, with cycle dates, mood, irritability, anxiety, sleep, energy, impact at work or in relationships and daily function.
- My Assessments — Structured check-ins beyond the daily scores, and onboarding questions about life and social context, read with the ongoing history.
- Food Tracker — Meal and drink lines, caffeine and alcohol, read with mood, energy, sleep and cycle day.
- Period Tracker — Start and stop dates, flow and how heavy or light bleeding felt, read with mood, irritability, sleep, energy and everything else logged.
- Weight Tracker — Scale readings or body notes, read with energy, sleep and cycle.
A weather line, a cycle date and a symptom score build one history that can answer the weather question with dates. Custom symptoms hold any extra label you choose, such as a forecast worry.
We make PMDD 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
- PubMed — Effects of Weather on the Severity of Menstrual Symptoms (Cureus, 2024)
- AAFP — Premenstrual Syndrome and Premenstrual Dysphoric Disorder
- Mayo Clinic — Premenstrual syndrome: diagnosis and treatment
- MedlinePlus — Premenstrual Syndrome
- PMC — Perceived poor sleep quality in women with severe premenstrual syndrome
FAQ
The answers below draw on the sources cited in this guide, and the app they mention is PMDD Journey (by Health Journey Labs).
Does weather cause PMDD symptoms?
Evidence is limited. A 2024 survey of 484 women concluded that the scientific support for a link between weather and menstrual symptom severity is still inconclusive, even though some women perceive one, so a personal record is the practical test of the idea.
PMDD Journey keeps weather words in the Daily Journal on the same date as the Daily check-in scores, which lets you test your own weeks against the cycle day instead of relying on a general claim.
Which weather details should I write down?
Four are enough: temperature, humidity, rain and air pressure. Write each as a plain word, such as hot, damp, none or falling, and use the same words every time so that two cycles can be compared fairly.
The external factors entry in the PMDD Journey Daily check-in is a natural home for those four words, which means the weather stays attached to that day's mood, anxiety and energy scores in the history.
How many cycles should I track weather before deciding?
Two cycles is the usual length for a symptom diary, because symptoms can differ from one cycle to the next. A single cycle can place a storm and a hard week together by chance.
With PMDD Journey, both cycles stay in one history, and the monthly view with days colored by intensity lets you set the worst days of cycle 1 alongside those of cycle 2.
Do I need a barometer or a special weather app?
No equipment is needed. One weather source you already use is enough, as long as you use the same one every day and copy its wording for pressure, such as rising, steady or falling, without converting units or rounding.
Because PMDD Journey accepts free text in the Daily Journal, the pressure word can be written in whatever form the source uses, and the habit of one source keeps the entries comparable later.
Is it a pattern if I feel worse on rainy days in the luteal phase?
It might be, but late-luteal days can feel worse for cycle reasons alone. A pattern needs similar rainy days in the follicular phase that stay calm, and it needs to repeat across two cycles.
The calendar view in PMDD Journey shows rainy days and calm days together with their colors, so you can see whether the follicular rainy days look different from the luteal ones across both cycles.
How do I stop checking the forecast all day?
Set the rules before the trial: one source, one reading, written in the evening, and no lookups on days without symptoms. A written rule is easier to follow than a decision made fresh each morning.
A line in the PMDD Journey Daily Journal can hold the rules themselves, and a Custom symptoms label for forecast worry shows how often the checking appears and on which cycle days of the month.
Can weather explain a bad day in the first half of my cycle?
It can be one of several facts on that date. Log the day's other facts too, such as meals, caffeine, work strain or travel, and note the cycle day, since a rough follicular day deserves its own attention in the record.
The Flare Tracker in PMDD Journey flags a day clearly worse than a usual week, so a bad follicular day is marked in the history with its weather words and cycle day for later review.
Should I record the forecast or the weather that happened?
Record the weather that happened, from the same source, in the evening. A forecast can differ from the day, and a mixed record of forecasts and observations makes the comparison between cycles unreliable.
Entries in the PMDD Journey Daily Journal are filed under the date they describe, which gives each evening note a fixed place in the history and makes the two cycles easy to line up.
What if I travel and the weather changes between cities?
Write the place or climate change as one of the day's facts and keep the same four weather words. Travel also changes meals, schedule and routine, so the trip itself is part of the record for those days.
Notes for a trip can live in the PMDD Journey Daily Journal alongside the cycle-day context, and the weekly view shows whether the trip days stand out in intensity compared with other weeks.
How do I tell a hot day from a luteal day?
Compare two kinds of days: hot days in the follicular phase and luteal days with mild weather. If symptoms follow the cycle day in both groups, cycle timing explains more of the record than temperature does.
The Period Tracker and Daily check-in in PMDD Journey hold the cycle day and the weather words together, so both comparison groups come from one history without copying dates by hand between pages.
Can I plan my week around the forecast?
Plans are safer when they rely on dates in your own record. If two cycles show a repeating overlap, the dates can guide choices such as moving an errand, while a single bad forecast is not enough evidence.
With PMDD Journey, the monthly view and the Weekly Goals entry let you write one small aim for a forecast-heavy week, and the result shows afterward whether the aim held on those dates.
What do I tell a clinician about weather?
Give the weather result in one line, after the cycle timing: the weather words shared by the worst days, or the statement that no overlap appeared over two cycles. Add the other facts of those days, such as travel.
The Doctor Report in PMDD Journey exports a one-page summary of cycle dates, mood, anxiety, sleep and energy from the logged history, and My Care Team holds short notes written during the visit.
What if I also have headaches or joint pain on weather days?
Log them as symptoms with their own cycle day and weather words. Several symptoms on one date are information for the clinician, who can assess whether they belong to the premenstrual pattern or to another condition.
Custom symptoms in PMDD Journey let you add a label such as headache or joint ache, and My Labs holds result dates from tests the clinician ordered to rule out other causes of the symptoms.
When do I stop logging weather?
Stop after the second cycle if no weather words repeat on the worst days. Write the result as a sentence, such as no weather overlap in two cycles, so the question is closed in the record.
The result sentence stays in the PMDD Journey Daily Journal on the date you wrote it, and the symptom scores and cycle dates continue in the same history without the weather line, so the review stays complete.
How can I protect my privacy in what I write about my health?
Entries from the late-luteal days can include anger, low mood or thoughts you would not say out loud. Protect the log with a passcode, keep it off shared devices, and agree with your clinician on how much detail to bring.
The health notes you enter in PMDD Journey are covered by the app's privacy policy, which describes how data is stored and handled. Questions about what the notes mean belong with a clinician, who gives medical advice.