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Average 24-hour pressure change (hPa)
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Select a state to zoom in
Average 24-hour pressure change (hPa)
Click a day to mark a migraine, and click it again to remove it.
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Sea-level pressure from Open-Meteo. Sensitivity bands (a fall within 24 hours of 3+ hPa for high, 6+ hPa for average, 15+ hPa for low sensitivity) are from “How much does barometric pressure have to drop to trigger a migraine?” (Migra, 2026).
Related research:
Cities ranked by how many drop periods they had: stretches of time when pressure was at least your sensitivity threshold lower than at the same time the day before.
Why the same time the day before? Pressure also rises and falls every day as the air heats and cools. In dry, high places like Grand Junction that daily cycle alone can swing pressure by 8 hPa, which would count almost every day as a drop. Comparing each hour with the same hour a day earlier cancels out that cycle, so the count reflects drops caused by incoming weather systems, the kind linked to migraines in the research listed under Sources.
| # | City | State | Drop periods |
|---|
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