San Francisco cycling weather

San Francisco is known for microclimates — fog, wind and temperature can change dramatically within a single ride. Coastal sections, bridges and inland hills all behave differently.

See wind, rain and temperature along every kilometre of your route — not just at the start.

Check weather along your route How it works

Why a city forecast isn't enough

City forecasts don't capture wind on the Golden Gate Bridge or inland heat. RouteWeather shows conditions for every segment of your route, helping you plan timing and direction.

What changes along a long route

Strong winds on bridges and coastal roads
Fog affects temperature and visibility
Inland areas can be significantly warmer
Wind often increases in the afternoon
Route direction matters for effort

Climate overview

Month	Temp Day	Temp Night	Sunny Days	Sun Hours	Rain Days	Precipitation	Humidity	UV Index	Day Length
Jan	15°C	7°C	27	8.1h	3	24 mm	75 %	2	9h 54m
Feb	15°C	8°C	17	6.6h	14	141 mm	73 %	3	10h 49m
Mar	15°C	9°C	27	9.5h	15	92 mm	70 %	4	11h 59m
Apr	17°C	10°C	29	11.4h	7	10 mm	68 %	5	13h 12m
May	19°C	11°C	31	13.3h	2	4 mm	65 %	6	14h 14m
Jun	18°C	12°C	30	12.8h	0	0 mm	67 %	7	14h 44m
Jul	17°C	13°C	31	11.4h	2	1 mm	66 %	8	14h 28m
Aug	20°C	14°C	31	12.0h	0	0 mm	68 %	7	13h 33m
Sep	21°C	15°C	27	10.3h	5	8 mm	70 %	5	12h 23m
Oct	20°C	13°C	26	8.9h	10	38 mm	72 %	4	11h 11m
Nov	16°C	11°C	25	7.7h	11	88 mm	76 %	2	10h 8m
Dec	13°C	8°C	22	6.6h	10	128 mm	77 %	2	9h 35m

See it in action

Try example route in San Francisco

Frequently asked questions

When is the best time to ride in San Francisco?

Morning is usually calmer, with less wind and fog. Afternoon winds can be strong, especially near the coast.

Why is wind important in SF?

Wind can significantly impact effort, especially on exposed bridges and coastal climbs.

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