September weather in Halfway, MO
The average temperature in Halfway in September is 67.6°F (54.8°F–80.5°F). Average precipitation: 4.11 inches.
September is a fall month in Halfway, and is warmer than the annual average of 55°F. Daily temperatures swing about 25.7°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
80.5°F
Avg Low
54.8°F
Precipitation
4.11 in
Daylight
12h 14m
September records in Halfway
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (2011) | 39.0°F (1967) | 1.50 in (1974) |
| September 2 | 100.0°F (2011) | 50.0°F (1965) | 3.34 in (2010) |
| September 3 | 97.0°F (1978) | 42.1°F (1974) | 1.93 in (2010) |
| September 4 | 99.0°F (1978) | 37.0°F (1974) | 3.43 in (2008) |
| September 5 | 97.0°F (1998) | 44.1°F (1988) | 1.39 in (1941) |
| September 6 | 98.1°F (1983) | 33.1°F (1988) | 1.76 in (1942) |
| September 7 | 97.0°F (1980) | 37.0°F (1988) | 1.18 in (1949) |
| September 8 | 99.0°F (1980) | 39.0°F (2011) | 3.62 in (1970) |
| September 9 | 97.0°F (1980) | 41.0°F (2024) | 3.09 in (1984) |
| September 10 | 93.9°F (1964) | 39.0°F (1976) | 2.31 in (1951) |
| September 11 | 93.0°F (2013) | 41.0°F (1968) | 1.93 in (1975) |
| September 12 | 96.1°F (1980) | 44.1°F (2022) | 2.30 in (1977) |
| September 13 | 96.1°F (2025) | 37.9°F (1964) | 1.10 in (1951) |
| September 14 | 98.1°F (2011) | 42.1°F (1974) | 5.40 in (2008) |
| September 15 | 95.0°F (2025) | 37.9°F (1961) | 2.61 in (2005) |
| September 16 | 93.0°F (1931) | 37.0°F (1993) | 1.85 in (1991) |
| September 17 | 96.1°F (1931) | 39.9°F (1981) | 2.35 in (2016) |
| September 18 | 95.0°F (2025) | 32.0°F (1981) | 3.41 in (1986) |
| September 19 | 95.0°F (2022) | 37.9°F (1991) | 1.77 in (1988) |
| September 20 | 96.1°F (2022) | 36.0°F (1991) | 2.26 in (1993) |
| September 21 | 96.1°F (2024) | 33.1°F (1983) | 2.40 in (1947) |
| September 22 | 97.0°F (2022) | 34.0°F (1995) | 2.26 in (1965) |
| September 23 | 91.9°F (2005) | 28.0°F (1983) | 3.80 in (1945) |
| September 24 | 91.0°F (2017) | 24.1°F (1989) | 3.15 in (1993) |
| September 25 | 91.9°F (2017) | 30.0°F (1989) | 4.32 in (1993) |
| September 26 | 89.1°F (2017) | 35.1°F (1975) | 4.19 in (1996) |
| September 27 | 87.1°F (1971) | 30.0°F (1989) | 3.83 in (1966) |
| September 28 | 90.0°F (2019) | 30.0°F (1989) | 4.77 in (1936) |
| September 29 | 90.0°F (1969) | 32.0°F (1992) | 2.68 in (1934) |
| September 30 | 90.0°F (1969) | 28.0°F (1984) | 3.05 in (1986) |