Today's barometric pressure in Dayton, a 48-hour pressure chart, and a risk score for weather-triggered migraine and headache, based on pressure drops, humidity, and temperature changes.
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Dayton's Miami Valley location in western Ohio is a natural corridor for weather systems moving through the Ohio River basin. The city's flat terrain offers no protection from frontal passages, making barometric changes sharp and sudden.
Worst season for migraines: November through April. Dayton's Great Miami River valley position places it in the Ohio Valley storm track where weather systems intensify as they cross the region. Winter and early spring fronts produce the most frequent pressure drops across the flat western Ohio landscape, peaking in March, when 64% of days see a 5 hPa drop.
Common triggers in Dayton: Ohio Valley frontal passage pressure drops, Great Miami River valley humidity and fog events, spring severe thunderstorm outflow boundaries. Dayton sits at the confluence of the Great Miami, Stillwater, Mad, and Wolf Creek rivers, making it one of the most river-influenced cities in Ohio. These waterways create a broad valley that channels weather systems and traps moisture during inversions. The flat terrain of the western Ohio till plains offers no shelter from approaching weather, and the convergence of multiple river valleys creates localized fog and humidity events that can differ from conditions just a few miles away.
Typical pressure: Dayton averages 990 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 974 hPa. Swings of 6-15 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Dayton ranks #46 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Dayton weather trigger migraines?
Yes. Dayton experiences 6-15 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Ohio Valley frontal passage pressure drops, Great Miami River valley humidity and fog events, spring severe thunderstorm outflow boundaries.
What time of year are migraines worst in Dayton?
In Dayton the most barometrically volatile stretch of the year falls in November through April. That is when weather is most likely to play a part, if weather is a trigger for you at all. See when migraine weather season starts across the U.S.
Is there a barometric pressure headache forecast for Dayton?
This page works as one. Many people call a headache that arrives with a weather change a barometric pressure headache, and this forecast tracks the pressure drops, humidity and temperature swings behind that idea. The score covers the next 24 hours in Dayton and the chart shows the next 48. It is built on migraine research, so treat it as a rough guide for other headaches. A sudden, severe headache needs urgent medical care, whatever the weather.
Your own forecast
This page shows the weather risk for everyone in Dayton. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Dayton's swings really line up with your attacks, and alerts you when conditions match your own trigger history.