September weather in Suisun City, CA
The average temperature in Suisun City in September is 71.7°F (56.6°F–86.9°F). Average precipitation: 0.08 inches.
September is a fall month in Suisun City, and is warmer than the annual average of 61.7°F. Daily temperatures swing about 30.3°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
86.9°F
Avg Low
56.6°F
Precipitation
0.08 in
Daylight
12h 14m
September records in Suisun City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 109.9°F (2017) | 43.0°F (2011) | 0.00 in (1951) |
| September 2 | 109.9°F (2017) | 36.0°F (2023) | 0.06 in (2000) |
| September 3 | 109.0°F (1955) | 48.9°F (1964) | 0.00 in (1951) |
| September 4 | 105.1°F (2022) | 50.0°F (1980) | 0.00 in (1951) |
| September 5 | 114.1°F (2022) | 44.1°F (1986) | 0.00 in (1951) |
| September 6 | 114.1°F (2022) | 48.9°F (1980) | 0.00 in (1951) |
| September 7 | 111.0°F (2020) | 46.9°F (1968) | 0.00 in (1951) |
| September 8 | 109.9°F (2022) | 48.0°F (1986) | 0.04 in (1985) |
| September 9 | 105.1°F (1951) | 44.1°F (1986) | 0.16 in (1985) |
| September 10 | 107.1°F (1984) | 39.9°F (1985) | 0.18 in (1978) |
| September 11 | 100.9°F (1953) | 45.0°F (1985) | 0.05 in (1978) |
| September 12 | 102.9°F (1953) | 45.0°F (1985) | 0.40 in (1963) |
| September 13 | 111.9°F (1953) | 43.0°F (1986) | 0.00 in (1951) |
| September 14 | 109.9°F (1953) | 45.0°F (1986) | 0.28 in (1955) |
| September 15 | 107.1°F (1951) | 43.0°F (1986) | 0.00 in (1951) |
| September 16 | 104.0°F (1971) | 45.0°F (1985) | 0.77 in (1989) |
| September 17 | 102.0°F (1984) | 46.9°F (1955) | 0.33 in (1977) |
| September 18 | 109.0°F (1984) | 41.0°F (1986) | 2.49 in (1959) |
| September 19 | 102.9°F (2000) | 42.1°F (1985) | 0.40 in (1956) |
| September 20 | 99.0°F (1984) | 39.0°F (1986) | 0.38 in (2007) |
| September 21 | 100.9°F (2015) | 42.1°F (1986) | 1.10 in (2013) |
| September 22 | 100.0°F (2009) | 42.1°F (1986) | 0.12 in (1973) |
| September 23 | 102.0°F (1964) | 46.0°F (1960) | 0.26 in (1990) |
| September 24 | 102.0°F (1964) | 46.9°F (1961) | 0.44 in (1986) |
| September 25 | 100.9°F (2019) | 41.0°F (1986) | 0.24 in (2014) |
| September 26 | 99.0°F (1963) | 45.0°F (1955) | 0.82 in (1972) |
| September 27 | 100.0°F (2009) | 44.1°F (1955) | 0.41 in (1957) |
| September 28 | 100.9°F (2020) | 45.0°F (1980) | 0.14 in (1998) |
| September 29 | 100.0°F (1966) | 43.0°F (2011) | 0.39 in (1989) |
| September 30 | 100.0°F (1952) | 43.0°F (1971) | 0.74 in (1983) |