San Francisco Weather in August

San Francisco in August sees very high daytime temperatures of 31°C (88°F) and nighttime lows of 27°C (81°F). Rainfall is fairly high this month at around 236 mm (9.3 in), so pack a rain jacket to stay dry.

Rainfall in San Francisco in August

Historically, August sees about 19 days of rain, with a monthly average of 236 mm (9.3 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in San Francisco in August

Expect highs of 31°C (88°F) in San Francisco in August, with nights dropping to around 27°C (81°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help. Typical temperatures can be misleading; some days will be hotter. Prepare with light clothing and plenty of hydration to stay cool.

If you prefer dry days with pleasant temperatures, August may not be the ideal month to visit San Francisco. Our weather planner can help you explore destinations with more pleasant weather conditions.