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Weather in San Francisco for August 2025

Your guide to San Francisco weather in August - trends and predictions
  • In general, the average temperature in San Francisco at the beginning of August is 20.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 22 °F by the end of August.

  • Precipitation in San Francisco during August is a rare event, with an average of fewer than 2 rainy days.

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Average dry days
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/13°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
81 %
Avg humidity

San Francisco in August average weather

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Temperatures trend during August in San Francisco

See the weather trend as well as the moving average line

August weather day by day

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Date Weather Temperatures Rain UV More
Aug. 1 Overcast
Overcast
19° /12° 0 mm 4
Aug. 2 Overcast
Overcast
21° /12° 0 mm 6
Aug. 3 Overcast
Overcast
20° /12° 0 mm 5
Aug. 4 Overcast
Overcast
20° /12° 0 mm 5
Aug. 5 Overcast
Overcast
21° /12° 0 mm 5
Aug. 6 Overcast
Overcast
23° /12° 0 mm 6
Aug. 7 Overcast
Overcast
22° /12° 0 mm 6
Aug. 8 Patchy rain possible
Patchy rain possible
19° /12° 0.1 mm 5
Aug. 9 Overcast
Overcast
20° /12° 0 mm 5
Aug. 10 Overcast
Overcast
19° /12° 0 mm 5
Aug. 11 Overcast
Overcast
18° /12° 0 mm 4
Aug. 12 Overcast
Overcast
19° /12° 0 mm 5
Aug. 13 Overcast
Overcast
21° /12° 0 mm 5
Aug. 14 Cloudy
Cloudy
21° /13° 0 mm 5
Aug. 15 Overcast
Overcast
22° /12° 0 mm 5
Aug. 16 Overcast
Overcast
22° /12° 0 mm 6
Aug. 17 Overcast
Overcast
21° /13° 0 mm 5
Aug. 18 Overcast
Overcast
20° /13° 0 mm 5
Aug. 19 Overcast
Overcast
21° /12° 0 mm 5
Aug. 20 Overcast
Overcast
23° /13° 0 mm 6
Aug. 21 Moderate rain at times
Moderate rain at times
21° /13° 0.7 mm 5
Aug. 22 Overcast
Overcast
21° /14° 0 mm 5
Aug. 23 Overcast
Overcast
22° /13° 0 mm 5
Aug. 24 Overcast
Overcast
22° /13° 0 mm 5
Aug. 25 Mist
Mist
21° /13° 0 mm 6
Aug. 26 Fog
Fog
22° /13° 0 mm 6
Aug. 27 Fog
Fog
23° /13° 0 mm 6
Aug. 28 Fog
Fog
22° /13° 0 mm 6
Aug. 29 Mist
Mist
22° /13° 0 mm 6
Aug. 30 Mist
Mist
23° /14° 0 mm 6
Aug. 31 Mist
Mist
21° /13° 0 mm 5
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Important Notice
Our weather forecast for San Francisco in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Francisco forecast closer to your planned date for the most up-to-date weather information.

San Francisco in August - FAQ

What are the expected maximum and minimum temperatures in San Francisco during August?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Francisco during August?
Rainfall in San Francisco during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in San Francisco during August?
The average wind speed in San Francisco during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in San Francisco

Explore the daily rainfall trends and prepare for San Franciscos August weather 💧

UV exposure in San Francisco during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is San Francisco?

Get accurate weather forecasts for San Francisco, located at latitude 37.775 and longitude -122.419. Stay updated with localized weather information tailored for San Francisco.

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