September weather in Rockville, MO
The average temperature in Rockville in September is 68.7°F (58.1°F–79.4°F). Average precipitation: 4.33 inches.
September is a fall month in Rockville, and is warmer than the annual average of 55.4°F. Daily temperatures swing about 21.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
79.4°F
Avg Low
58.1°F
Precipitation
4.33 in
Daylight
12h 14m
September records in Rockville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 105.1°F (2000) | 46.9°F (1967) | 3.10 in (1941) |
| September 2 | 104.0°F (1954) | 32.0°F (1914) | 3.00 in (2010) |
| September 3 | 106.0°F (1939) | 37.0°F (1914) | 2.42 in (1953) |
| September 4 | 105.1°F (1954) | 41.0°F (1974) | 4.85 in (1965) |
| September 5 | 104.0°F (1899) | 45.0°F (1974) | 3.56 in (2021) |
| September 6 | 107.1°F (1913) | 41.0°F (1988) | 2.22 in (1930) |
| September 7 | 105.1°F (1947) | 44.1°F (1956) | 1.95 in (2018) |
| September 8 | 104.0°F (1939) | 41.0°F (1986) | 2.03 in (1962) |
| September 9 | 102.9°F (1939) | 44.1°F (1943) | 3.30 in (1951) |
| September 10 | 102.0°F (1936) | 41.0°F (1976) | 3.25 in (1922) |
| September 11 | 104.0°F (1936) | 39.0°F (1940) | 2.65 in (2015) |
| September 12 | 102.9°F (1909) | 36.0°F (1940) | 2.23 in (2008) |
| September 13 | 102.0°F (1893) | 36.0°F (1902) | 5.78 in (1961) |
| September 14 | 105.1°F (1893) | 41.0°F (2014) | 6.39 in (1998) |
| September 15 | 100.9°F (1893) | 39.0°F (1904) | 2.49 in (1969) |
| September 16 | 100.9°F (1954) | 37.0°F (1903) | 2.30 in (2010) |
| September 17 | 99.0°F (1954) | 35.1°F (1903) | 1.34 in (1899) |
| September 18 | 98.1°F (1893) | 37.0°F (1981) | 1.65 in (2014) |
| September 19 | 104.0°F (1954) | 37.0°F (1991) | 2.40 in (1942) |
| September 20 | 100.9°F (1954) | 37.9°F (1991) | 1.43 in (1965) |
| September 21 | 98.1°F (1893) | 32.0°F (1913) | 2.90 in (1972) |
| September 22 | 99.0°F (1956) | 30.9°F (1995) | 3.80 in (1970) |
| September 23 | 96.1°F (1939) | 32.0°F (1995) | 5.12 in (1986) |
| September 24 | 98.1°F (1911) | 34.0°F (1942) | 3.00 in (2023) |
| September 25 | 93.0°F (1898) | 37.0°F (1989) | 3.17 in (1993) |
| September 26 | 96.1°F (1938) | 33.1°F (1912) | 2.73 in (1917) |
| September 27 | 95.0°F (1897) | 28.9°F (1942) | 2.69 in (1920) |
| September 28 | 105.1°F (1953) | 30.9°F (1908) | 2.25 in (1944) |
| September 29 | 100.0°F (1953) | 30.9°F (1908) | 2.87 in (1986) |
| September 30 | 95.0°F (1938) | 32.0°F (1984) | 1.62 in (1986) |