Private migraine weather tool

See the pressure change before the weather changes

Check the next 72 hours of pressure, temperature and humidity. This is weather context—not a medical prediction—and your location is never sent to Dim.

Your browser sends approximate coordinates directly to Open-Meteo. Dim does not receive, store or share them.

Can barometric pressure trigger migraine?

Weather is a reported trigger for some people with migraine, but there is no universal pressure threshold. Pressure also changes alongside temperature, humidity, sleep and routine, so a forecast cannot identify a cause.

How to test your own pattern

Record attacks consistently and compare their timing with pressure changes over several weeks. Dim automatically adds weather and pressure when you log an attack, while your health history stays on your device and personal iCloud.

Read the evidence and tracking guide →

Track the pattern, not a generic risk score

Dim logs an attack in three taps and builds a doctor-ready history. No account, no ads, nothing sold.

Download Dim on the App Store

Dim is a diary, not a medical device. This tool shows general weather data and does not diagnose, predict, treat or prevent migraine.