September weather in Brunswick, MO
The average temperature in Brunswick in September is 68.1°F (57.7°F–78.6°F). Average precipitation: 3.49 inches.
September is a fall month in Brunswick, and is warmer than the annual average of 54.1°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
78.6°F
Avg Low
57.7°F
Precipitation
3.49 in
Daylight
12h 15m
September records in Brunswick
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1930) | 45.0°F (1915) | 4.46 in (2012) |
| September 2 | 100.0°F (1953) | 46.0°F (1949) | 2.58 in (1936) |
| September 3 | 104.0°F (1939) | 44.1°F (1974) | 3.25 in (1941) |
| September 4 | 102.9°F (1913) | 37.9°F (1974) | 2.11 in (1918) |
| September 5 | 102.0°F (1925) | 44.1°F (1974) | 1.60 in (1971) |
| September 6 | 102.9°F (1936) | 41.0°F (1988) | 1.00 in (2004) |
| September 7 | 102.9°F (1939) | 42.1°F (1956) | 2.33 in (1911) |
| September 8 | 100.0°F (1947) | 39.0°F (1986) | 2.66 in (1914) |
| September 9 | 100.9°F (1925) | 41.0°F (1986) | 3.65 in (1915) |
| September 10 | 100.0°F (1919) | 41.0°F (1976) | 3.75 in (1903) |
| September 11 | 100.0°F (1936) | 42.1°F (1910) | 6.01 in (1975) |
| September 12 | 99.0°F (1939) | 41.0°F (1955) | 3.62 in (1928) |
| September 13 | 100.0°F (1939) | 37.0°F (1902) | 6.60 in (1961) |
| September 14 | 100.9°F (1939) | 37.9°F (1902) | 3.29 in (1998) |
| September 15 | 100.9°F (1939) | 37.9°F (1923) | 3.63 in (1911) |
| September 16 | 98.1°F (1931) | 37.9°F (1984) | 2.04 in (1895) |
| September 17 | 100.0°F (1927) | 37.0°F (2007) | 3.86 in (1905) |
| September 18 | 99.0°F (1925) | 37.0°F (1901) | 0.97 in (1923) |
| September 19 | 96.1°F (1931) | 30.0°F (1991) | 1.62 in (1904) |
| September 20 | 98.1°F (1947) | 32.0°F (1991) | 2.20 in (1926) |
| September 21 | 96.1°F (1940) | 34.0°F (1991) | 3.27 in (1947) |
| September 22 | 100.0°F (1937) | 32.0°F (1995) | 3.35 in (1970) |
| September 23 | 95.0°F (1939) | 32.0°F (1983) | 2.15 in (1959) |
| September 24 | 93.9°F (1935) | 33.1°F (1989) | 2.60 in (1986) |
| September 25 | 93.9°F (1920) | 33.1°F (1989) | 1.17 in (1993) |
| September 26 | 93.9°F (1938) | 32.0°F (1984) | 1.70 in (1976) |
| September 27 | 93.0°F (1956) | 32.0°F (1942) | 1.55 in (1916) |
| September 28 | 95.0°F (1939) | 30.0°F (1942) | 3.96 in (1999) |
| September 29 | 100.0°F (1953) | 28.9°F (1942) | 3.34 in (1934) |
| September 30 | 95.0°F (1953) | 30.0°F (1984) | 2.87 in (1986) |