San Francisco County weather
Our guide to the weather in San Francisco County during August
We've looked at the most up-to-date weather data for San Francisco County, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about San Francisco County weather in August.
How warm is it in San Francisco County during August?
The temperature reaches around 24℃ during the daytime in August, falling away to 15℃ at night. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.
Does it rain in San Francisco County during August?
The answer is no. San Francisco County is typically bone dry in August. You're not likely to see a thunderstorm during your trip.
Is it windy in San Francisco County during August?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in August. With warm air temperatures and high humidity, any breeze will feel warm but refreshing.
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