The best time to visit San Francisco
Month-by-month climate averages for San Francisco, CA, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit San Francisco is usually May, June, July and August, when daytime highs sit in the pleasant 60-78°F range and the heaviest December rain is behind you.
San Francisco is warmest in October (highs near 70°F) and coldest in January (lows around 45°F), with roughly 28 inches of precipitation across the year and December the wettest month. The sweet spot for most visitors is May, June, July and August.
These are long-run averages. For the actual days you are travelling, check the live San Francisco forecast - and note how much the models agree, because that tells you how much to trust it.
San Francisco weather by month
what to expect in San Francisco through the year, 1991-2020 averagesHere is San Francisco's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to San Francisco by season.