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Migraine Weather Forecast for San Francisco, CA

Tuesday, August 11 · updated throughout the day · scores run 0–100, higher is a kinder day

64

Manageable

A manageable day, but worth pacing. Some factors may affect Migraine symptoms.

5-day outlook

Today

64

Manageable

Wed

60

Manageable

Thu

75

Good

Fri

78

Good

Sat

75

Good

How weather affects migraine

Not every weather factor hits every condition the same way. These are the inputs our Migraine scoring model weighs most heavily — and in San Francisco (West Coast), they interact with the local climate pattern: Seattle, San Francisco, and Los Angeles — Pacific coast weather trends and body-forecast scores.

Barometric pressure changes

35% of score

Barometric pressure drops are one of the most consistently reported migraine triggers, likely affecting intracranial pressure and trigeminal nerve sensitivity.

Daily temperature swings

20% of score

Rapid temperature fluctuations can trigger migraines through neural pathways including trigeminal activation and cortical spreading depression.

Humidity

15% of score

High humidity is associated with migraine onset, possibly through thermoregulatory stress, co-occurring low-pressure systems, and trigeminal nerve activation.

UV exposure

10% of score

Bright sunlight is a potent migraine trigger — up to 67% of migraineurs report light sensitivity. High UV correlates with intense sunlight and glare that activate photosensitivity pathways.

Wind

10% of score

Warm dry winds (chinook/foehn) have been associated with increased migraine frequency above approximately 38 km/h (24 mph), likely through the rapid pressure and temperature changes they bring.

This forecast uses San Francisco's weather. Yours should use your street's.

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Research behind the Migraine model

  • Kimoto K, et al. 'Influence of barometric pressure in patients with migraine headache.' Internal Medicine. 2011;50(18):1923-1928.
  • Mukamal KJ, et al. 'Weather and air pollution as triggers of severe headaches.' Neurology. 2009;72(10):922-927.
  • Hoffmann J, Lo H, et al. 'Weather sensitivity in migraineurs.' Journal of Neurology. 2011;258(4):596-602.
  • Cooke LJ, et al. 'Chinook winds and migraine headache.' Neurology. 2000;54(2):302-307.
  • Portt A, et al. 'Migraine and air pollution: a systematic review.' Headache. 2023;63(9):1203-1219.

Felt That is not a medical service. Forecast scores describe weather conditions associated with symptom changes in published research and community-reported patterns — they are not medical advice, diagnosis, or treatment. Individual responses to weather vary widely. Always consult your healthcare provider about managing your condition.