Typical weather on 21 September in San Francisco
On 21 September, the average temperature in San Francisco is 24°C. The maximum temperature can reach 31°C, while the minimum temperature can be 19°C. According to the weather history of San Francisco, there is an average of 0,3 mm of precipitation on this day. The wind speed is 5 Bft, and the wind direction is mainly from the West.
With 31°C, San Francisco hit the highest temperature in the last 10 years on 21 September 2015. The lowest daytime temperature on this day was 18°C in 2016. The extreme night temperatures ranged from a low of 13°C to a high of 18°C.
Average weather on 21 September for San Francisco |
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Average Temperature | 24°C |
Total Precipitation | 0,3 mm |
Check out the climate for all days of September in San Francisco
Temperature on 21 September in San Francisco per year
This chart shows the average temperature on 21 September in San Francisco, measured in degrees Celsius, over the past years.
Precipitation on 21 September in San Francisco over the past years
This chart shows the total measured precipitation in millimetres on 21 September in San Francisco over the past years.
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