Measurements:
°C
°F
San Francisco
58°F
N 19 mph
Feels like: 54°F
Precip: 0%
World Resorts USA San Francisco Weather September Weather in San Francisco

San Francisco Weather: September

Average Day Temperature: 66.7°F
Average Night Temperature: 57.8°F
Sea Water Temperature: 63.2°F
Number of Sunny Days: 18 days
Sunshine Hours: 11.8 - 13.0 hours
Number of Rainy Days: 0 days
Precipitation Totals: 0.1 in

Air Temperature in September, °F

Select Year: 2024 2023 2022

The highest day temperature in September 2024 was 75°F. The lowest night temperature was 54°F. The average values for day and night temperatures during September were 64.2°F и 57.2°F respectivly.

San Francisco Water Sea Temperature in September, °F

Select Year: 2024 2023 2022

The average sea surface temperature in September 2024 for San Francisco was 64.4°F. The maximum and minimum values were 62.2°F and 67.4°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in September, in

Precipitation total in September for San Francisco is 0.1 in. It makes september the least rainy month of the year.

Wind Speed in September, mph

The average wind speed in September is 7.6 mph. It makes September one of the most windless months of the year for San Francisco.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Francisco in September is 8.7 hours.

Best Time to Visit San Francisco
The most sunny months:
June 19 days
September 18 days
October 18 days
The most warm months:
August 67.6 °F
September 66.7 °F
October 65.5 °F
Warmest sea temperature:
September 63.2 °F
August 62.8 °F
October 61.6 °F
The most cold months:
December 54.7 °F
January 55.2 °F
February 56.2 °F
The most rainy months:
February 4 days
March 4 days
December 4 days
The most windy months:
May 10 mph
June 9 mph
April 9 mph

San Francisco on the Weather Map

USA Resorts:
NAME
Boston +48
Chicago +34
Hawaii +80
Honolulu +80
Houston +74
Las Vegas +68
Los Angeles +74
Maui +74
Miami +80
New York +48
San Diego +70
San Francisco +58
Sarasota +74
Tampa +72
Washington +48
24 Hours Weather Forecast
San Francisco
Local time: 13:37
21 nov, thursday
1500 58°F
N
19 mph
1800 58°F
N
17 mph
2100 58°F
N
17 mph
22 nov, friday
0000 58°F
N
14 mph
0300 58°F
N
19 mph
0600 58°F
N
22 mph
0900 56°F
N
19 mph
1200 56°F
N
18 mph