Today's barometric pressure in Chattanooga, 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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Chattanooga's Tennessee River valley and surrounding ridges create a natural funnel for weather systems. The city's Appalachian location means fronts slow down and linger, extending the duration of pressure changes compared to open-terrain cities.
Worst season for migraines: December through February. Chattanooga's Tennessee River valley location, in a gap between the Cumberland Plateau and the southern Appalachians, creates a natural funnel for weather systems. Winter fronts bring the most frequent pressure drops, from December through February, peaking in January, when 47% of days see a 5 hPa drop. Spring squall lines follow, and summer is far calmer, at 8% of days or fewer.
Common triggers in Chattanooga: valley-channeled severe thunderstorms, Lookout Mountain and Signal Mountain orographic effects, temperature inversions trapping river valley moisture. Chattanooga sits at 680 feet in a gap where the Tennessee River cuts through the southern end of the Appalachian chain, with Lookout Mountain and Signal Mountain rising 1,700+ feet above the river. This dramatic terrain channels weather through the valley and creates orographic effects that can intensify or split storm systems. The river valley traps moisture and fog, creating inversions that add persistent humidity triggers beyond what the surrounding plateau communities experience.
Typical pressure: Chattanooga averages 993 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 982 hPa. Swings of 4-10 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Chattanooga ranks #74 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Chattanooga weather trigger migraines?
Yes. Chattanooga experiences 4-10 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include valley-channeled severe thunderstorms, Lookout Mountain and Signal Mountain orographic effects, temperature inversions trapping river valley moisture.
What time of year are migraines worst in Chattanooga?
In Chattanooga the most barometrically volatile stretch of the year falls in December through February. 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 Chattanooga?
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 Chattanooga 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 Chattanooga. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Chattanooga's swings really line up with your attacks, and alerts you when conditions match your own trigger history.