Today's barometric pressure in Greenville, 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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Greenville sits at 307 metres in the upstate, directly beneath the Blue Ridge Escarpment where the mountains rise abruptly from the Piedmont. Pressure averages 983 hPa, and that wall of terrain to the northwest governs much of the local weather.
Worst season for migraines: January through March. Cool-season systems approaching from the west are forced up the escarpment, which enhances precipitation and slows their passage. That stretching out of each event means pressure changes here tend to be prolonged rather than abrupt.
Common triggers in Greenville: Blue Ridge escarpment orographic enhancement, cold air damming and freezing drizzle, prolonged rather than abrupt pressure changes. The escarpment above Greenville is one of the wettest places in the eastern United States, receiving upwards of 2,000 millimetres of rain a year within sight of the city. Cold air damming east of the mountains is also common, trapping chilly air at the surface beneath warmer air aloft and producing extended periods of freezing drizzle that the raw temperature forecast does not capture.
Typical pressure: Greenville averages 983 hPa at rest, measured at the city's own elevation rather than corrected to sea level, and storm systems can push readings down to 971 hPa. Swings of 5-10 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
2026 index: Greenville is not one of the 100 metros ranked in our 2026 U.S. Migraine Risk Index, which shows how they compare.
Can Greenville weather trigger migraines?
Yes. Greenville experiences 5-10 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Blue Ridge escarpment orographic enhancement, cold air damming and freezing drizzle, prolonged rather than abrupt pressure changes.
What time of year are migraines worst in Greenville?
In Greenville the most barometrically volatile stretch of the year falls in January through March. 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 Greenville?
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 Greenville 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 Greenville. The MigrAid app learns yours. It saves the barometric pressure, humidity and temperature with every migraine you log, shows whether Greenville's swings really line up with your attacks, and alerts you when conditions match your own trigger history.