Current Weather and Forecast in San Francisco, CA
California, United States 🇺🇸
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Explore San Francisco's typical temperatures and climate below - Live data returns shortly.
About the weather in San Francisco
San Francisco has an oceanic climate. September is the warmest month, with average highs of 70°, and December the coldest, when nights fall to around 46°. December brings the most rain, on about 10 days, while June is the sunniest, with 13.3 hours of sunshine a day. Over a whole year it rains on roughly 56 days.
San Francisco climate guide: monthly averages, seasons and the best time to visit
Common questions
When should I visit San Francisco?
April to September is the sweet spot for San Francisco - the dry season is running but the afternoons are still bearable. Expect 66°F (19°C) in the afternoon and around 1 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in April.
Is there snow in San Francisco?
Effectively no. The 2015-2024 record for San Francisco shows no regular measurable snowfall.
What is the coldest month in San Francisco?
December, with highs of 56°F (14°C) and lows near 46°F (8°C). The coldest day in the 2015-2024 record fell to 33°F (0°C).
When does it rain most in San Francisco?
December, at 5.1 inches (129 mm) over about 10 days. August is the driest month, at less than 1 mm.
Is San Francisco cold in winter?
December nights average 46°F (8°C). Chilly rather than harsh - hard freezes are uncommon.
How much do temperatures drop at night in San Francisco?
By about 6°C on an average day - a narrower day-to-night gap than most of the 3496 cities we track. In September that means 70°F (21°C) down to 58°F (14°C).
When is San Francisco at its hottest?
September, averaging 70°F (21°C) by day and 58°F (14°C) overnight. The hottest single day in our 2015-2024 record for this location reached 101°F (38°C).