September weather in Brimson, MO
The average temperature in Brimson in September is 65.8°F (54.4°F–77.1°F). Average precipitation: 3.88 inches.
September is a fall month in Brimson, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.1°F
Avg Low
54.4°F
Precipitation
3.88 in
Daylight
12h 15m
September records in Brimson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (2000) | 41.0°F (1967) | 3.14 in (1980) |
| September 2 | 98.1°F (1984) | 46.9°F (1974) | 1.71 in (1977) |
| September 3 | 98.1°F (2000) | 41.0°F (1974) | 1.59 in (1961) |
| September 4 | 97.0°F (2000) | 37.0°F (1974) | 1.97 in (1975) |
| September 5 | 96.1°F (1990) | 41.0°F (1962) | 0.69 in (1975) |
| September 6 | 97.0°F (1985) | 37.0°F (1988) | 4.04 in (1964) |
| September 7 | 98.1°F (1990) | 39.0°F (2025) | 2.20 in (2015) |
| September 8 | 100.0°F (2013) | 37.9°F (1986) | 2.07 in (2016) |
| September 9 | 98.1°F (1985) | 39.0°F (1995) | 1.33 in (1989) |
| September 10 | 99.0°F (2013) | 37.0°F (1976) | 5.25 in (2014) |
| September 11 | 98.1°F (2013) | 36.0°F (1959) | 1.34 in (2020) |
| September 12 | 99.0°F (2000) | 39.0°F (1975) | 2.63 in (1974) |
| September 13 | 96.1°F (2025) | 33.1°F (2014) | 4.03 in (1961) |
| September 14 | 91.9°F (1991) | 34.0°F (1996) | 2.94 in (1998) |
| September 15 | 91.9°F (1994) | 34.0°F (2007) | 1.02 in (1970) |
| September 16 | 91.0°F (1978) | 35.1°F (1999) | 2.15 in (1988) |
| September 17 | 93.0°F (1978) | 34.0°F (1999) | 2.15 in (1970) |
| September 18 | 93.9°F (1983) | 34.0°F (1981) | 2.30 in (1978) |
| September 19 | 93.0°F (1985) | 28.9°F (1991) | 2.81 in (2010) |
| September 20 | 91.0°F (1985) | 30.0°F (1991) | 1.95 in (1965) |
| September 21 | 96.1°F (2022) | 27.0°F (1999) | 2.23 in (1965) |
| September 22 | 91.0°F (2017) | 28.0°F (1995) | 2.30 in (2019) |
| September 23 | 91.0°F (2017) | 30.0°F (1983) | 4.32 in (1959) |
| September 24 | 91.9°F (2017) | 28.9°F (1989) | 0.91 in (2010) |
| September 25 | 91.0°F (1984) | 32.0°F (1975) | 1.93 in (1981) |
| September 26 | 90.0°F (1998) | 30.9°F (1975) | 4.65 in (1959) |
| September 27 | 91.0°F (2021) | 32.0°F (1984) | 1.30 in (1999) |
| September 28 | 90.0°F (2021) | 32.0°F (1961) | 1.36 in (1999) |
| September 29 | 91.0°F (2021) | 27.0°F (1984) | 5.20 in (2019) |
| September 30 | 91.0°F (2023) | 27.0°F (1984) | 1.51 in (1985) |