Today's barometric pressure in Jacksonville, 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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Jacksonville's Atlantic coast position exposes it to tropical systems and sea breeze fronts that create daily pressure fluctuations. Summer thunderstorms roll through almost every afternoon, each bringing a small but measurable pressure shift.
Worst season for migraines: January. Jacksonville's northeast Florida coast can see tropical systems curve close by, and those can bring a severe single drop. Most pressure drops, though, come with winter fronts, peaking in January, when 41% of days see a 5 hPa drop. Summer sea-breeze thunderstorms develop almost daily along the St. Johns River corridor, but pressure barely moves, 4% of days or fewer in each summer month.
Common triggers in Jacksonville: tropical system pressure drops along the Atlantic coast, daily sea-breeze thunderstorm convergence, high humidity combined with summer heat above 95 degrees. Jacksonville's sprawling metro area spans the lower St. Johns River basin, where the wide river and nearby Atlantic Ocean create competing sea-breeze and river-breeze convergence zones. These convergence boundaries trigger afternoon thunderstorms that can affect one side of the city while the other remains clear, making pressure changes hyperlocal.
Typical pressure: Jacksonville averages 1016 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 990 hPa. Swings of 4-9 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Jacksonville ranks #85 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Jacksonville weather trigger migraines?
Yes. Jacksonville experiences 4-9 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include tropical system pressure drops along the Atlantic coast, daily sea-breeze thunderstorm convergence, high humidity combined with summer heat above 95 degrees.
What time of year are migraines worst in Jacksonville?
In Jacksonville the most barometrically volatile stretch of the year falls in January. 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 Jacksonville?
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 Jacksonville 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 Jacksonville. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Jacksonville's swings really line up with your attacks, and alerts you when conditions match your own trigger history.