Weather and Migraine: How to Keep a Useful Pressure Diary

Weather changes are a possible migraine trigger for some people, but a pressure reading cannot predict an attack on its own. A useful weather diary puts symptoms alongside pressure observations and other changes in your day. It also includes days when the weather changed and no headache followed.

The goal is to explore a pattern you can discuss with your doctor, not to turn every forecast into a warning.

What does barometric pressure measure?

Barometric pressure describes the pressure of the air around you. Weather services often show it in hectopascals, written as hPa. A lower number does not automatically mean a migraine will happen. Your response to weather may differ from someone else’s.

The NHS migraine guide lists possible triggers such as stress, tiredness and irregular meals. These can change on the same day as the weather, making a simple cause-and-effect explanation difficult.

This article offers a diary method. It does not establish a pressure threshold for migraine or claim that weather tracking prevents attacks.

What should you put in a weather diary?

Keep the entry short enough to repeat:

• Date and approximate symptom start time
• Pain severity and other symptoms
• Pressure reading, if available, with its time and source
• Whether you were travelling or changing altitude
• Unusual sleep, meals or stress that day
• Medication taken and its timing

Use the same pressure source when possible. A weather station and a phone sensor do not necessarily measure pressure in the same way. Some weather services adjust readings to sea level, while a device measures conditions at its location. Moving to a different height can affect a sensor reading.

Look at days without attacks too

Suppose you notice three headaches during rainy weather. That may seem convincing until you also count the rainy days when you felt well. Likewise, headaches during stable weather matter. Both help you avoid noticing only the days that fit your expectation.

Review a few weeks of records rather than drawing a conclusion from one storm. If your diary is incomplete, say so. A small number of observations may not be enough to separate weather from sleep changes or missed meals.

A practical question is: “Does this pattern repeat when the other parts of my day are similar?” That is more useful than searching for a pressure number that is supposed to be unsafe for everyone.

How can Cephala help with this record?

Cephala shows barometric information alongside your migraine tracking. Treat it as context for your diary. It is not a diagnosis or a guarantee about the next attack.

If readings are missing, write that down rather than estimating them. If you changed altitude, add a short note. Your symptom record still matters even without pressure data.

What can you do with a possible pattern?

Share the record with your clinician and ask whether it changes anything about your existing care plan. Do not take extra medication or change a prescribed dose solely because pressure falls. A diary can support a conversation, but it does not replace treatment instructions.

If forecast checking makes you anxious, review the data less often. Keeping regular meals and a steady routine may be more useful than watching every small weather change.

Common questions

Is there a pressure number that causes migraine?

There is no single number in this guide that should be treated as a personal danger threshold. Discuss repeated observations with your clinician.

Does an attack after a pressure drop prove the weather caused it?

No. Events can happen together without one causing the other. Our trigger tracking guide explains how to compare patterns fairly.

Can I keep a diary without weather data?

Yes. Start with symptoms and medication. The beginner diary guide gives a simple template.

Sources and scope

• NHS: Migraine and possible triggers
• Pressure logging suggestions above are practical recordkeeping guidance, not a validated migraine prediction method.