San Rafael September Weather

Averages and records for weather in San Rafael, California in the month of September.
Typical San Rafael September Weather
1991–2020
Average daily high 79.5 °F
Average daily low 54.1 °F
Average monthly precipitation 0.1 inches
Average monthly snow none
Daily chance of precipitation 2.5%
Daily chance of snow 0%
San Rafael September Weather Records
1894–2024
Highest temperature 110 °F September 1, 2017
Lowest temperature 32 °F September 30, 1894
Highest daily low 71 °F September 3, 2017
Lowest daily high 54 °F September 18, 1895
Hottest average high temperature 88.2 °F 1958
Coldest average high temperature 71.1 °F 1986
Most daily precipitation 4.4 inches September 18, 1959
Most monthly precipitation 6.1 inches 1904
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
September 1 79.9 54.9 110 46
September 2 79.8 54.8 108 38
September 3 79.8 54.8 104 48
September 4 79.9 54.8 104 36
September 5 79.9 54.7 99 35
September 6 80.0 54.7 109 37
September 7 79.9 54.7 110 46
September 8 79.9 54.6 108 40
September 9 79.9 54.6 100 40
September 10 79.8 54.5 99 37
September 11 79.8 54.5 101 34
September 12 79.7 54.3 105 36
September 13 79.7 54.2 105 35
September 14 79.7 54.2 106 38
September 15 79.5 54.1 106 40
September 16 79.4 54.1 100 39
September 17 79.1 54.0 97 39
September 18 79.0 53.9 99 36
September 19 78.8 53.8 102 36
September 20 78.5 53.9 97 35
September 21 78.3 53.8 100 44
September 22 78.2 53.7 101 43
September 23 78.2 53.6 99 36
September 24 78.3 53.5 101 38
September 25 78.1 53.4 100 39
September 26 77.9 53.3 99 40
September 27 77.7 53.2 98 36
September 28 77.7 53.1 99 37
September 29 77.8 53.0 96 35
September 30 77.8 53.0 101 32
Weather Station Details
Years Station Coordinates
1894–2024 San Rafael Civic Center location