Modesto September Weather

Averages and records for weather in Modesto, California in the month of September.
Typical Modesto September Weather
1991–2020
Average daily high 89.1 °F
Average daily low 59.4 °F
Average monthly precipitation 0.1 inches
Daily chance of precipitation 1.3%
Modesto September Weather Records
1906–2024
Highest temperature 112 °F September 6, 2022
Lowest temperature 40 °F September 26, 1948
Highest daily low 79 °F September 8, 2022
Lowest daily high 60 °F September 30, 1930
Hottest average high temperature 93.8 °F 1984
Coldest average high temperature 80.8 °F 1930
Most daily precipitation 1.9 inches September 18, 1959
Most monthly precipitation 2.2 inches 1983
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 91.6 61.4 105 46
September 2 91.3 61.3 108 49
September 3 91.1 61.1 106 49
September 4 91.0 61.0 105 50
September 5 90.9 60.9 107 48
September 6 90.8 60.8 112 47
September 7 90.7 60.6 107 47
September 8 90.5 60.5 108 49
September 9 90.3 60.4 105 44
September 10 90.2 60.2 106 42
September 11 90.0 60.0 101 42
September 12 89.7 59.8 104 45
September 13 89.6 59.7 102 44
September 14 89.4 59.6 100 43
September 15 89.2 59.4 103 45
September 16 88.9 59.3 101 46
September 17 88.6 59.1 102 46
September 18 88.3 58.9 102 44
September 19 88.0 58.7 102 44
September 20 87.6 58.4 104 43
September 21 87.1 58.2 104 45
September 22 86.8 57.9 102 44
September 23 86.5 57.7 104 42
September 24 86.3 57.5 103 43
September 25 86.0 57.3 100 43
September 26 85.7 57.1 104 40
September 27 85.4 56.9 100 42
September 28 85.1 56.6 99 42
September 29 84.9 56.4 100 42
September 30 84.7 56.2 100 43
Weather Station Details
Years Station Coordinates
1906–2024 Modesto City-County Airport location