Temperatures in August
It's warm in August in San Francisco with an average temperature of 23°C. Temperatures this month range from a low of 22°C to a high of 26°C. At night, you can expect temperatures between 15°C and 16°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Francisco in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in San Francisco with warm temperatures, averaging around 23°C during the day and nights close to 16°C. You won’t see any precipitation in the first days of the month, it’s all sunny skies.
Mid-August
By mid-August, the average daytime temperature rises to around 24°C, with nights close to 16°C. No precipitation expected during this period, so you can enjoy plenty of sunshine.
End of August
By the end of August, the average daytime temperature in San Francisco will be around 24°C, with nights close to 16°C. No precipitation expected, with plenty of sunshine on the horizon.
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Precipitation in August
According to weather history, there is only 0,4 mm of precipitation in August. The wind speed is around 5 Bft, mostly coming from the West.
The average chance of precipitation is only 1% in August.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for San Francisco. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
San Francisco in August |
London | ||
|---|---|---|---|
 Average Temperature |
23°C | 22°C | |
 High Temp |
26°C | 24°C | |
| Low Temp |
22°C | 19°C | |
 Total Precipitation |
0,4 mm | 60 mm | |
| Rainy Days |
0 days | 10 days | |
July
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit San Francisco?
Want nice weather? Then August is a great time to be in San Francisco. You’ll have pleasant temperatures and little chance of rain this month.
Temperature records for San Francisco in August
With 37°C, San Francisco hit the highest temperature in the last 10 years in August 2020. The lowest daytime temperature in this month was 17°C in 2018. The extreme night temperatures ranged from a low of 11°C to a high of 20°C.
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Daily Temperature in August in San Francisco
This chart shows the average daily temperatures, both day and night, for each day in August in San Francisco, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in San Francisco
The chart below shows the average daily precipitation in August for San Francisco, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect it to stay dry all month in San Francisco.
Daily UV Index in August in San Francisco
This chart shows the average daily UV index in August in San Francisco, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in San Francisco Over the Years
This chart shows the average temperature in August in San Francisco, measured in degrees Celsius, over the past years.
Total Precipitation in August in San Francisco Over the Years
This chart shows the average precipitation in August in San Francisco, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for San Francisco
Click on a specific day in August for detailed info on the typical weather on that day in San Francisco. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in San Francisco
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Average Weather in San Francisco by Month
Click on a month below to see detailed weather info for San Francisco. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Francisco for all months at once
