San Francisco
August
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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30
Dry days
1
Rainy days
0
Snow days
22°/13°
Temperatures
18 km/h
Avg max wind
81 %
Avg humidity
San Francisco in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2 21° | 3 20° | ||||
| 4 20° | 5 21° | 6 23° | 7 22° | 8  19° | 9 20° | 10 19° |
| 11 18° | 12 19° | 13 21° | 14  21° | 15 22° | 16 22° | 17 21° |
| 18 20° | 19 21° | 20 23° | 21  21° | 22 21° | 23 22° | 24 22° |
| 25  21° | 26 22° | 27 23° | 28 22° | 29 22° | 30 23° | 31 21° |
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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 | 19° /12° | 0 mm | 4 | |
| Aug. 2 | Overcast | 21° /12° | 0 mm | 6 | |
| Aug. 3 | Overcast | 20° /12° | 0 mm | 5 | |
| Aug. 4 | Overcast | 20° /12° | 0 mm | 5 | |
| Aug. 5 | Overcast | 21° /12° | 0 mm | 5 | |
| Aug. 6 | Overcast | 23° /12° | 0 mm | 6 | |
| Aug. 7 | Overcast | 22° /12° | 0 mm | 6 | |
| Aug. 8 | Patchy rain possible | 19° /12° | 0.1 mm | 5 | |
| Aug. 9 | Overcast | 20° /12° | 0 mm | 5 | |
| Aug. 10 | Overcast | 19° /12° | 0 mm | 5 | |
| Aug. 11 | Overcast | 18° /12° | 0 mm | 4 | |
| Aug. 12 | Overcast | 19° /12° | 0 mm | 5 | |
| Aug. 13 | Overcast | 21° /12° | 0 mm | 5 | |
| Aug. 14 | Cloudy | 21° /13° | 0 mm | 5 | |
| Aug. 15 | Overcast | 22° /12° | 0 mm | 5 | |
| Aug. 16 | Overcast | 22° /12° | 0 mm | 6 | |
| Aug. 17 | Overcast | 21° /13° | 0 mm | 5 | |
| Aug. 18 | Overcast | 20° /13° | 0 mm | 5 | |
| Aug. 19 | Overcast | 21° /12° | 0 mm | 5 | |
| Aug. 20 | Overcast | 23° /13° | 0 mm | 6 | |
| Aug. 21 | Moderate rain at times | 21° /13° | 0.7 mm | 5 | |
| Aug. 22 | Overcast | 21° /14° | 0 mm | 5 | |
| Aug. 23 | Overcast | 22° /13° | 0 mm | 5 | |
| Aug. 24 | Overcast | 22° /13° | 0 mm | 5 | |
| Aug. 25 | Mist | 21° /13° | 0 mm | 6 | |
| Aug. 26 | Fog | 22° /13° | 0 mm | 6 | |
| Aug. 27 | Fog | 23° /13° | 0 mm | 6 | |
| Aug. 28 | Fog | 22° /13° | 0 mm | 6 | |
| Aug. 29 | Mist | 22° /13° | 0 mm | 6 | |
| Aug. 30 | Mist | 23° /14° | 0 mm | 6 | |
| Aug. 31 | 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.
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