48-hour migraine risk based on barometric pressure, humidity, and temperature changes in San Francisco.
San Francisco's famous fog is driven by pressure differentials between the cool ocean and warm interior valleys. These daily pressure shifts, combined with the city's microclimates, create a subtly challenging environment for migraine sufferers.
Worst season for migraines: November through March. Winter Pacific storms bring the most significant pressure drops to the Bay Area. The city's famous fog is itself driven by pressure differentials between the cool ocean and warm Central Valley, creating daily pressure oscillations even in calm weather.
Common triggers in San Francisco: Pacific storm fronts, fog-driven daily pressure oscillations, microclimate temperature differentials across the city. San Francisco's famous microclimates mean pressure and temperature can vary significantly within a few miles. The fog that rolls through the Golden Gate represents a measurable pressure event each time, and residents in different neighborhoods may experience different trigger levels on any given day.
Typical pressure: San Francisco averages 1016 hPa at rest, but storm systems can push readings down to 1001 hPa. Swings of 8-14 hPa over 24 hours are common during active weather and fall within the range most associated with pressure-triggered migraines.
Can San Francisco weather trigger migraines?
Yes. San Francisco experiences 8-14 hPa barometric pressure swings, and research shows pressure drops are one of the most common migraine triggers. The city's specific patterns include Pacific storm fronts, fog-driven daily pressure oscillations, microclimate temperature differentials across the city.
What time of year are migraines worst in San Francisco?
Migraine sufferers in San Francisco typically report the highest attack frequency during November through March. This aligns with the period of greatest barometric volatility in the region.
How do I track migraine triggers in San Francisco?
Use MigrAid to log your attacks with one tap. The app automatically records barometric pressure, temperature, and humidity at the time of each migraine, then finds patterns between your attacks and San Francisco's weather conditions over time.
Loading live forecast for San Francisco...