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Weather in San Francisco, California for August 2025

Your guide to San Francisco weather in August - trends and predictions

    Temperatures

  • Until now, August 2025 in San Francisco is cooler than usual, with temperatures averaging 15.7 °F, this is -4.4 °F below the typical seasonal average.

  • Expect cooler weather in the next days in San Francisco with the forecast suggesting a temperature of 17.8 °F, lower than the historical average.

  • In general, the average temperature in San Francisco at the beginning of August is 20.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 22.1 °F by the end of August.

    • Rain 🌧️

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

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
31
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/13°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
77 %
Avg humidity

San Francisco Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
19°
2
Partly cloudy
20°
3
Sunny
20°
4
Partly cloudy
19°
5
Partly cloudy
20°
6
Sunny
22°
7
Sunny
21°
8
Sunny
20°
9
Partly cloudy
16°
10
Mist
15°
11
Mist
15°
12
Patchy rain possible
19°
13
Patchy rain possible
18°
14
Sunny
17°
15
Sunny
16°
16
Sunny
19°
17
Sunny
19°
18
Sunny
19°
19
Sunny
19°
20
Sunny
20°
21
Sunny
19°
22
Sunny
18°
23
Sunny
22°
24
Partly cloudy
21°
25
Sunny
21°
26
Sunny
23°
27
Sunny
23°
28
Sunny
23°
29
Sunny
22°
30
Sunny
22°
31
Sunny
21°

Temperatures trend during August in San Francisco

See the weather trend as well as the moving average line

August weather in San Francisco day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Patchy rain possible
Patchy rain possible
 19° /12° 0 mm 5
Aug. 2 Partly cloudy
Partly cloudy
 20° /12° 0 mm 5
Aug. 3 Sunny
Sunny
 20° /12° 0 mm 5
Aug. 4 Partly cloudy
Partly cloudy
 19° /12° 0 mm 5
Aug. 5 Partly cloudy
Partly cloudy
 20° /12° 0 mm 5
Aug. 6 Sunny
Sunny
 22° /12° 0 mm 5
Aug. 7 Sunny
Sunny
 21° /13° 0 mm 5
Aug. 8 Sunny
Sunny
 20° /12° 0 mm 5
Aug. 9 Partly cloudy
Partly cloudy
 16° /13° 0 mm 2.2
Aug. 10 Mist
Mist
 15° /12° 0 mm 2.3
Aug. 11 Mist
Mist
 15° /12° 0 mm 2.3
Aug. 12 Patchy rain possible
Patchy rain possible
 19° /13° 0.1 mm 2.4
Aug. 13 Patchy rain possible
Patchy rain possible
 18° /14° 0.1 mm 0
Aug. 14 Sunny
Sunny
 17° /14° 0 mm 4
Aug. 15 Sunny
Sunny
 16° /13° 0 mm 4
Aug. 16 Sunny
Sunny
 19° /14° 0 mm 5
Aug. 17 Sunny
Sunny
 19° /14° 0 mm 5
Aug. 18 Sunny
Sunny
 19° /15° 0 mm 5
Aug. 19 Sunny
Sunny
 19° /14° 0 mm 5
Aug. 20 Sunny
Sunny
 20° /14° 0 mm 5
Aug. 21 Sunny
Sunny
 19° /13° 0 mm 5
Aug. 22 Sunny
Sunny
 18° /13° 0 mm 5
Aug. 23 Sunny
Sunny
 22° /13° 0 mm 5
Aug. 24 Partly cloudy
Partly cloudy
 21° /13° 0 mm 5
Aug. 25 Sunny
Sunny
 21° /12° 0 mm 6
Aug. 26 Sunny
Sunny
 23° /13° 0 mm 6
Aug. 27 Sunny
Sunny
 23° /13° 0 mm 6
Aug. 28 Sunny
Sunny
 23° /13° 0 mm 6
Aug. 29 Sunny
Sunny
 22° /13° 0 mm 6
Aug. 30 Sunny
Sunny
 22° /13° 0 mm 6
Aug. 31 Sunny
Sunny
 21° /12° 0 mm 6
Next
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.
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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 21° 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 0 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 17 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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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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