San Francisco in August
goodbusy · 6th of the 12 months that clear the bar
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The numbers
| Daily high | 23°C |
|---|---|
| Nightly low | 15°C |
| Feels like, afternoon | 21°C |
| Rainy days | 0 · 2 mm |
| Humidity | 76% |
| Sunshine | 12.6 h/day |
| Daylight | 13.4 h/day |
| Crowds | 65 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 2 mm.
What August is known for
- Peak season — Summer weather attracts tourists to the city's many outdoor attractions.
Written by a language model from the climate figures; the numbers above are measured and win where the two disagree.
What to pack
- Sun protection: about 13 hours of sunshine a day.
- Humidity averages 76%; breathable fabrics dry faster.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
| Cost of living | expensive — prices run about 100% of the United States' (World Bank, 2025) |
|---|---|
| Currency | United states dollar |
| Languages | Hawaiian, Spanish, Samoan, Chamorro |
| Plugs | Type A and B, 120 V |
| Driving | On the right |
| Emergency | 911 |
| Calling code | +1 |
| Travel advice | No advice against travel — UK Foreign Office, updated 2026-08-18 |
Health. Before you travel check that: your destination can provide the healthcare you may need you have appropriate travel insurance for local treatment or unexpected medical evacuation This is particularly important if you have a health condition or are pregnant. Emergency medical number Dial 911 and ask for an ambulance. Contact your insurance or medical assistance company quickly if you’re referred to … More.
Facts from Wikidata (CC0), the UK Foreign Office (Open Government Licence) and the World Bank, refreshed 2026-09-23. The advisory is written for British travellers; entry rules depend on your passport.
The other months at San Francisco
- January ok
- February good
- March good
- April sweet spot
- May sweet spot
- June sweet spot
- July sweet spot
- August
- September sweet spot
- October good
- November good
- December ok
← July · All twelve months at San Francisco · September →
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