Today's barometric pressure in Louisville, 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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Louisville's Ohio River valley location traps moisture and creates frequent temperature inversions. The city's weather can change dramatically within hours as fronts move through the relatively flat terrain, catching migraine sufferers off guard.
Worst season for migraines: November through April. Louisville's Ohio River valley position puts it in the path of frequent frontal passages. Late winter brings the most volatility, peaking in February, when 59% of days see a 5 hPa drop, as warm Gulf air surges north and collides with lingering cold air funneled through the river valley from the Great Lakes region.
Common triggers in Louisville: Ohio River valley cold air channeling, spring severe thunderstorm outflows, autumn temperature inversions trapping river valley humidity. Louisville straddles the Falls of the Ohio where the river drops 26 feet, creating a natural boundary between the Bluegrass region and the Southern Indiana lowlands. The river valley traps moisture and pollution, creating frequent temperature inversions that hold triggers close to the surface. The Knobs region south of the city adds terrain complexity that can enhance storm development.
Typical pressure: Louisville averages 1000 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 986 hPa. Swings of 6-14 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Louisville ranks #50 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Louisville weather trigger migraines?
Yes. Louisville experiences 6-14 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Ohio River valley cold air channeling, spring severe thunderstorm outflows, autumn temperature inversions trapping river valley humidity.
What time of year are migraines worst in Louisville?
In Louisville 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 Louisville?
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 Louisville 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 Louisville. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Louisville's swings really line up with your attacks, and alerts you when conditions match your own trigger history.