September weather in Exeter, CA
The average temperature in Exeter in September is 73.9°F (57.3°F–90.5°F). Average precipitation: 0.07 inches.
September is a fall month in Exeter, and is warmer than the annual average of 62.9°F. Daily temperatures swing about 33.2°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 13m. For travel, September is hot.
Avg High
90.5°F
Avg Low
57.3°F
Precipitation
0.07 in
Daylight
12h 13m
September records in Exeter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 107.1°F (1955) | 50.0°F (1937) | 0.05 in (1964) |
| September 2 | 108.0°F (1950) | 48.0°F (1964) | 0.00 in (1915) |
| September 3 | 107.1°F (1950) | 48.9°F (1964) | 0.20 in (2003) |
| September 4 | 107.1°F (1950) | 48.9°F (1918) | 0.62 in (1978) |
| September 5 | 107.1°F (1932) | 46.9°F (1940) | 1.68 in (1978) |
| September 6 | 108.0°F (1923) | 48.0°F (1922) | 0.33 in (1991) |
| September 7 | 109.0°F (1923) | 44.1°F (1927) | 0.29 in (1958) |
| September 8 | 108.0°F (1923) | 44.1°F (1927) | 0.03 in (2014) |
| September 9 | 109.0°F (1944) | 44.1°F (1927) | 0.00 in (1915) |
| September 10 | 107.1°F (1944) | 41.0°F (1927) | 0.16 in (1976) |
| September 11 | 106.0°F (1922) | 41.0°F (1952) | 0.49 in (1985) |
| September 12 | 105.1°F (1922) | 43.0°F (1972) | 0.14 in (1959) |
| September 13 | 105.1°F (1922) | 44.1°F (1915) | 0.02 in (1923) |
| September 14 | 105.1°F (1929) | 42.1°F (1927) | 0.09 in (1918) |
| September 15 | 106.0°F (1979) | 42.1°F (1921) | 0.26 in (2015) |
| September 16 | 108.0°F (1937) | 43.0°F (1986) | 0.12 in (1989) |
| September 17 | 106.0°F (1937) | 44.1°F (1977) | 1.25 in (1950) |
| September 18 | 104.0°F (1917) | 39.9°F (1978) | 0.56 in (1967) |
| September 19 | 105.1°F (1917) | 37.9°F (1947) | 0.17 in (1989) |
| September 20 | 107.1°F (2016) | 39.9°F (1986) | 0.03 in (1939) |
| September 21 | 102.9°F (1936) | 39.9°F (1986) | 0.21 in (2017) |
| September 22 | 106.0°F (1949) | 39.0°F (1986) | 0.43 in (2007) |
| September 23 | 106.0°F (1939) | 41.0°F (1945) | 0.57 in (1958) |
| September 24 | 102.9°F (1919) | 39.0°F (1981) | 0.53 in (1982) |
| September 25 | 102.9°F (2024) | 37.0°F (1948) | 0.35 in (1982) |
| September 26 | 105.1°F (1963) | 35.1°F (1948) | 0.74 in (1982) |
| September 27 | 105.1°F (1963) | 37.0°F (1948) | 0.18 in (1918) |
| September 28 | 104.0°F (2009) | 41.0°F (1948) | 0.06 in (1918) |
| September 29 | 100.9°F (1924) | 41.0°F (1971) | 1.64 in (1976) |
| September 30 | 100.9°F (1987) | 37.9°F (2009) | 0.61 in (1983) |