Will you get a migraine today? Enter your city or ZIP code to see the barometric pressure forecast for the next 48 hours and a migraine risk score for the next 24.
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MigrAid sends you a notification on high-risk days so you can prepare.
Research shows barometric pressure drops, humidity spikes, and temperature swings can trigger migraines in sensitive individuals. This forecast analyzes these factors to estimate your risk. Everyone's triggers are different. Track your personal patterns in MigrAid for predictions tailored to you.
This forecast shows general weather risk. MigrAid learns your unique patterns and sends you personalized predictions before attacks happen.
Download MigrAid for iOS Download MigrAid for AndroidA migraine forecast is not a prediction that you will get an attack. It is an estimate of how much the atmosphere is about to move, scored against the conditions that research has linked to attacks in weather-sensitive people. Whether that matters for you depends on whether you are one of them, which is something only your own logged history can answer.
The forecast pulls the hourly outlook for your location from Open-Meteo and scores the next 24 hours out of 100. Most of the weight goes to pressure. The largest fall over any 6-hour window is worth up to 50 points, with steps at 1, 3, 5 and 8 hPa, and the sum of every hourly fall adds up to 20 more. A temperature swing of 9, 18 or 27°F adds up to 15, and average humidity of 65, 75 or 85 percent adds up to 15. A score of 65 or more reads as high risk, 35 to 64 as moderate, and anything lower as low.
The chart and the numbers beside it show surface pressure, measured at your location's own elevation, so Denver reads near 840 hPa where weather apps quote a sea-level figure closer to 1013. The score runs on the sea-level series, so the same thresholds apply in Denver and in Miami. These thresholds are our own scoring choices, guided by the research on this page. They are not a validated clinical tool, and they cannot know your personal triggers.
Weather is a commonly reported trigger but not a universal one. In a study of 1,207 migraine patients published in Cephalalgia, 53.2 percent named weather as a trigger. That places it fourth, behind stress at 79.7 percent, hormones at 65.1 and skipped meals at 57.3, and just ahead of sleep disruption at 49.8. A separate analysis of 7,054 emergency visits in Neurology found headache risk rose about 7.5 percent for every 5C increase in temperature over the preceding 24 hours, with lower barometric pressure showing a smaller but measurable effect.
The consistent finding across this literature is that change matters more than absolute value. A steady 1000 hPa is unremarkable. A fall from 1015 to 1000 across a day is the pattern people report feeling.
Three things routinely break the link between a forecast and an attack. Attacks often begin hours before the pain, during the prodrome phase, so the trigger you blame may have arrived while you already felt fine. Triggers also stack, and a pressure drop on a well-rested day may do nothing while the same drop after a poor night does not. And elevation shifts your entire baseline: Denver sits near 840 hPa and Cheyenne near 814, so a reading that would signal a deep storm at sea level is an ordinary Tuesday there.
The useful move is not to cancel plans on high-risk days. It is to stop stacking. On a day the barometer is set to move, protect the variables you control: keep sleep and meals on schedule, hold caffeine steady, stay ahead on water, and keep acute medication within reach rather than at home in a drawer. That converts weather from an ambush into a scheduled risk.
Above all, verify the premise before organising around it. Log attacks for eight to twelve weeks with pressure recorded automatically alongside them, then look at whether your attacks actually cluster on volatile days. For a meaningful number of people they do not, and finding that out is worth as much as any forecast. Our guide to barometric pressure and migraines covers the underlying mechanism, and the 2026 U.S. Migraine Risk Index ranks 100 cities by how volatile their weather actually is.
No study we could find has tested whether checking a migraine forecast prevents attacks. What researchers have studied is the link underneath it, whether migraine attacks and pressure changes go together, and three recent papers show how unsettled that question still is.
A 2025 systematic review in Cureus reviewed 14 studies with 2,696 participants. Several found that pressure drops or rapid swings went with more frequent migraines, fewer found any link with how severe attacks were, and none found one with how long they lasted. The authors judged the overall evidence limited, because the studies measured pressure and migraine in very different ways.
A 2024 review in Current Pain and Headache Reports by Denney, Lee and Joshi put weather's effect on migraine attacks at around 20 percent, with very strong weather having a larger effect. Many people name weather as a trigger, yet the review found no causal relationship between weather and migraine patterns, wide variation between individuals, and a stronger effect when weather combines with other factors.
A 2025 study in Frontiers in Neurology followed 26,777 adults with migraine through Japanese insurance claims and national weather records. It found no association between the seasons with the biggest pressure changes and migraine occurrence, which it measured by triptan prescriptions, in any of Japan's eight regions. A modest effect appeared only once temperature, humidity, wind and sunlight were added to the model.
Read together, a forecast is a sensible early warning if your own records show you react to pressure changes, and background noise if they do not. Logging attacks with the pressure saved alongside them is how you find out which applies to you, and the migraine weather season guide shows which months count as trigger season across 100 U.S. metros.
Yes. Type your city or a 5-digit U.S. ZIP code into the box at the top of this page and the forecast runs for that spot, anywhere the Open-Meteo weather service covers. There are also 170 ready-made U.S. city pages, and each one adds that city's typical pressure, its storm lows and its most volatile months.
Several weather and headache apps include one. They usually work from pressure changes, and some add temperature, humidity, wind or storms. The MigrAid app for iPhone and Android works from your own history instead: it saves the barometric pressure, temperature and humidity automatically with every migraine you log, shows whether your attacks line up with the weather, and its premium tier adds predictive alerts when conditions match your own trigger history.
There is no agreed number, and the studies that name one are small. In a 2011 diary study of 28 patients in Internal Medicine, migraine was more frequent when pressure fell by more than 5 hPa from the day of the attack to the next day. A 2015 study of 34 patients in SpringerPlus found attacks began most often when pressure sat 6 to 10 hPa below the standard 1013 hPa as low pressure moved in. Both are sea-level readings from Japan, so they do not carry over to a high-altitude city's surface pressure. For scale, 5 hPa is about 0.15 inches of mercury and 1013 hPa is 29.92 inHg. This forecast scores the largest fall over any 6 hours, with steps at 1, 3, 5 and 8 hPa.
Weather is a trigger for some people with migraine, not for everyone. In a study of 1,207 patients published in Cephalalgia in 2007, 53.2 percent named weather as a trigger. Reviews of the research describe the effect as modest and inconsistent: a 2024 review in Current Pain and Headache Reports put weather's effect on migraine attacks at around 20 percent, and concluded that weather combined with other factors appears to be the stronger trigger.
Mostly. Headache and migraine forecasts usually draw on the same weather inputs, and this one is scored against research on migraine. No forecast can tell a migraine from a more serious headache. Call 911 or go to the emergency room if a headache starts suddenly and is extremely painful, or comes with numbness or weakness in the face or body, trouble speaking, walking or remembering, loss of vision, confusion or drowsiness, a seizure, or a very high temperature with a stiff neck, or if it follows a head injury in the last 3 months. Do not put those down to the weather.
A weather forecast cannot tell you that. It can tell you whether pressure, temperature and humidity are about to move enough to matter if weather is one of your triggers, and the score on this page covers the next 24 hours. Whether weather is a trigger for you at all is something your own records can show, once you have logged eight to twelve weeks of attacks with the pressure saved alongside them.
Sources: Farah A, et al. Impact of barometric pressure changes on the severity, frequency, and duration of migraine attacks: a systematic review. Cureus, 2025 - Denney DE, Lee J, Joshi S. Whether weather matters with migraine. Current Pain and Headache Reports, 2024 - Tatsumoto M, et al. Association between seasons with substantial atmospheric pressure change and migraine occurrence. Frontiers in Neurology, 2025 - Kimoto K, et al. Influence of barometric pressure in patients with migraine headache. Internal Medicine, 2011 - Okuma H, Okuma Y, Kitagawa Y. Examination of fluctuations in atmospheric pressure related to migraine. SpringerPlus, 2015 - Kelman L. The triggers or precipitants of the acute migraine attack. Cephalalgia, 2007 - NHS. Headaches: when to get help