San Jacinto September Weather

Averages and records for weather in San Jacinto, California in the month of September.
Typical San Jacinto September Weather
1991–2020
Average daily high 93.4 °F
Average daily low 60.1 °F
Average monthly precipitation 0.3 inches
Average monthly snow none
Daily chance of precipitation 3.1%
Daily chance of snow 0%
San Jacinto September Weather Records
1893–2024
Highest temperature 116 °F September 3, 1982
Lowest temperature 35 °F September 19, 1989
Highest daily low 79 °F September 8, 2022
Lowest daily high 60 °F September 19, 1989
Hottest average high temperature 101.2 °F 1899
Coldest average high temperature 77.8 °F 1904
Most daily precipitation 2.9 inches September 19, 1939
Most monthly precipitation 4.7 inches 1939
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 96.8 62.3 110 45
September 2 96.6 62.2 114 44
September 3 96.4 62.1 116 44
September 4 96.3 61.9 110 42
September 5 96.1 61.8 114 41
September 6 95.8 61.6 115 41
September 7 95.5 61.4 111 40
September 8 95.2 61.3 110 42
September 9 95.0 61.0 108 40
September 10 94.8 60.8 110 40
September 11 94.6 60.5 112 41
September 12 94.3 60.3 115 37
September 13 94.1 60.2 115 36
September 14 93.8 60.0 109 39
September 15 93.6 59.8 111 37
September 16 93.4 59.7 108 37
September 17 93.2 59.5 108 39
September 18 92.9 59.3 109 39
September 19 92.6 59.0 107 35
September 20 92.1 58.7 109 39
September 21 91.7 58.4 110 39
September 22 91.4 58.0 109 40
September 23 91.1 57.6 108 38
September 24 90.9 57.4 108 41
September 25 90.6 57.1 109 41
September 26 90.4 56.9 109 39
September 27 90.0 56.6 108 40
September 28 89.7 56.3 107 40
September 29 89.5 56.0 109 39
September 30 89.3 55.8 110 36
Weather Station Details
Years Station Coordinates
1978–2024 San Jacinto location
1893–1978 San Jacinto location