United StatesAverage weather for San Francisco 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.
Start of August
The month of August starts in San Francisco with warm temps, averaging around 23°C during the day and nights around 16°C. No precipitation expected at the start of the month; it’ll be sunny.
Mid August
By mid-August, daytime temps rise to around 24°C, with nights around 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 is around 24°C, while nighttime temps are about 16°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
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.
San Francisco in August |
New York | ||
|---|---|---|---|
 Average temperature |
23°C | 30°C | |
 Max. temperature |
26°C | 31°C | |
| Min. temperature |
22°C | -5°C | |
 Total precipitation |
0,4 mm | 79 mm | |
| Rainy days |
0 days | 13 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?
Looking for great weather? August is a good time to be in San Francisco. The temperatures are nice, and there’s little chance of rain this month.
Temperature records
With 37°C in 2020, San Francisco reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 17°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 20°C.
Check out the climate of San Francisco for all months and discover the best travel time
Daily Temperature in August in San Francisco
This chart shows the average daily high and low temperatures in August for San Francisco, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in San Francisco
The chart below shows the average daily precipitation in August for San Francisco, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every 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 few years.
Total precipitation in August in San Francisco over the years
This chart shows the average precipitation in August in San Francisco, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in August for San Francisco
Click on any day in August to get detailed info about the usual 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
Have you been to San Francisco in August?
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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
