Today's barometric pressure in Baltimore, 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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Baltimore's Chesapeake Bay proximity creates a maritime influence that modulates but doesn't eliminate pressure swings. The mid-Atlantic storm track runs directly over the city, bringing frequent weather system passages especially in winter and spring.
Worst season for migraines: November through April. Baltimore's Inner Harbor location subjects the city to both coastal storms tracking up the Atlantic and continental systems sweeping east. Nor'easters are the biggest pressure events, but the Chesapeake Bay also generates local weather effects that create smaller, more frequent pressure variations.
Common triggers in Baltimore: nor'easter pressure drops, Chesapeake Bay moisture surges, summer heat dome events with high humidity. Baltimore sits at the head of the Chesapeake Bay, the largest estuary in the US. The bay's warm waters fuel moisture-laden air that flows over the city, and the Patapsco River valley channels this moisture into the downtown basin. The city's position between the bay and the Piedmont foothills creates a convergence zone where marine and continental air masses collide frequently.
Typical pressure: Baltimore averages 1015 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 996 hPa. Swings of 7-16 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Baltimore ranks #42 of 100 in our 2026 U.S. Migraine Risk Index, where #1 is the most challenging city for weather-driven migraine.
Can Baltimore weather trigger migraines?
Yes. Baltimore experiences 7-16 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include nor'easter pressure drops, Chesapeake Bay moisture surges, summer heat dome events with high humidity.
What time of year are migraines worst in Baltimore?
In Baltimore 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 Baltimore?
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 Baltimore 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 Baltimore. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Baltimore's swings really line up with your attacks, and alerts you when conditions match your own trigger history.