September weather in Modesto, CA
The average temperature in Modesto in September is 73.9°F (58.6°F–89.1°F). Average precipitation: 0.06 inches.
September is a fall month in Modesto, and is warmer than the annual average of 63.1°F. Daily temperatures swing about 30.5°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 12h 14m. For travel, September is hot.
Avg High
89.1°F
Avg Low
58.6°F
Precipitation
0.06 in
Daylight
12h 14m
September records in Modesto
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 105.1°F (2007) | 46.0°F (1964) | 0.28 in (1915) |
| September 2 | 108.0°F (2017) | 48.9°F (1928) | 0.00 in (1906) |
| September 3 | 106.0°F (2017) | 48.9°F (1964) | 0.28 in (1945) |
| September 4 | 105.1°F (1988) | 50.0°F (1954) | 0.06 in (1978) |
| September 5 | 107.1°F (2022) | 48.0°F (1927) | 0.63 in (1978) |
| September 6 | 111.9°F (2022) | 46.9°F (1964) | 0.25 in (1912) |
| September 7 | 107.1°F (2020) | 46.9°F (1935) | 0.43 in (1969) |
| September 8 | 108.0°F (2022) | 48.9°F (1928) | 0.05 in (1985) |
| September 9 | 105.1°F (1944) | 44.1°F (1931) | 0.12 in (1978) |
| September 10 | 106.0°F (2015) | 42.1°F (1928) | 0.05 in (1960) |
| September 11 | 100.9°F (1979) | 42.1°F (1928) | 0.00 in (1906) |
| September 12 | 104.0°F (1979) | 45.0°F (1966) | 0.12 in (1963) |
| September 13 | 102.0°F (1971) | 44.1°F (1936) | 0.00 in (1906) |
| September 14 | 100.0°F (1929) | 43.0°F (1927) | 0.20 in (2009) |
| September 15 | 102.9°F (1979) | 45.0°F (1927) | 0.30 in (1910) |
| September 16 | 100.9°F (1937) | 46.0°F (1927) | 0.68 in (1989) |
| September 17 | 102.0°F (1984) | 46.0°F (1959) | 0.74 in (1950) |
| September 18 | 102.0°F (1984) | 44.1°F (1947) | 1.86 in (1959) |
| September 19 | 102.0°F (1939) | 44.1°F (1965) | 0.28 in (1956) |
| September 20 | 104.0°F (1939) | 43.0°F (1965) | 0.28 in (2005) |
| September 21 | 104.0°F (1939) | 45.0°F (1960) | 0.40 in (1916) |
| September 22 | 102.0°F (1939) | 44.1°F (1945) | 1.05 in (1983) |
| September 23 | 104.0°F (1939) | 42.1°F (1927) | 0.53 in (1982) |
| September 24 | 102.9°F (1997) | 43.0°F (1929) | 0.58 in (1986) |
| September 25 | 100.0°F (1963) | 43.0°F (1929) | 0.65 in (1982) |
| September 26 | 104.0°F (1963) | 39.9°F (1948) | 0.52 in (1939) |
| September 27 | 100.0°F (1963) | 42.1°F (1929) | 0.20 in (1938) |
| September 28 | 99.0°F (2010) | 42.1°F (1929) | 0.45 in (1989) |
| September 29 | 100.0°F (1992) | 42.1°F (1929) | 0.75 in (1983) |
| September 30 | 100.0°F (1988) | 43.0°F (1929) | 0.50 in (1916) |