September weather in Havre, MT
The average temperature in Havre in September is 57.7°F (42.5°F–73.0°F). Average precipitation: 1.06 inches. Average snowfall is 0.4 inches.
September is a fall month in Havre, and is warmer than the annual average of 43.6°F. Daily temperatures swing about 30.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
73.0°F
Avg Low
42.5°F
Precipitation
1.06 in
Snow
0.4 in
September records in Havre
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1983) | 35.1°F (1999) | 0.43 in (2008) |
| September 2 | 100.9°F (1998) | 32.0°F (1974) | 0.41 in (1999) |
| September 3 | 102.9°F (2022) | 28.9°F (1962) | 1.00 in (1965) |
| September 4 | 98.1°F (1978) | 34.0°F (1962) | 0.41 in (2016) |
| September 5 | 100.9°F (1967) | 35.1°F (1962) | 0.81 in (2015) |
| September 6 | 98.1°F (1980) | 28.0°F (1992) | 0.70 in (1985) |
| September 7 | 104.0°F (2022) | 33.1°F (1962) | 0.47 in (2013) |
| September 8 | 97.0°F (1979) | 30.9°F (1962) | 0.42 in (1970) |
| September 9 | 93.9°F (2017) | 26.1°F (1962) | 0.48 in (2019) |
| September 10 | 90.0°F (1963) | 30.0°F (1989) | 0.37 in (1979) |
| September 11 | 93.9°F (2017) | 23.0°F (1989) | 0.97 in (1978) |
| September 12 | 91.9°F (1990) | 27.0°F (1970) | 1.12 in (1985) |
| September 13 | 90.0°F (1987) | 24.1°F (1970) | 0.69 in (1967) |
| September 14 | 90.0°F (2012) | 21.9°F (1970) | 0.43 in (2017) |
| September 15 | 93.9°F (1979) | 26.1°F (1982) | 0.48 in (2017) |
| September 16 | 95.0°F (2009) | 28.9°F (1980) | 0.82 in (2003) |
| September 17 | 99.0°F (2009) | 27.0°F (1991) | 0.56 in (1986) |
| September 18 | 93.9°F (1981) | 23.0°F (1991) | 1.52 in (2024) |
| September 19 | 96.1°F (2009) | 24.1°F (1991) | 0.70 in (1968) |
| September 20 | 89.1°F (2025) | 24.1°F (1995) | 0.82 in (1968) |
| September 21 | 90.0°F (2025) | 18.0°F (1995) | 0.50 in (2023) |
| September 22 | 89.1°F (2011) | 25.0°F (1993) | 0.70 in (2016) |
| September 23 | 93.0°F (1992) | 21.0°F (2000) | 0.89 in (2007) |
| September 24 | 93.9°F (2009) | 19.9°F (1984) | 0.57 in (2013) |
| September 25 | 96.1°F (2001) | 26.1°F (1980) | 1.95 in (1986) |
| September 26 | 88.0°F (1963) | 24.1°F (1961) | 0.26 in (1982) |
| September 27 | 89.1°F (2001) | 19.0°F (1984) | 0.46 in (1982) |
| September 28 | 93.0°F (2022) | 18.0°F (1984) | 0.64 in (2019) |
| September 29 | 90.0°F (1976) | 21.0°F (1985) | 0.65 in (2019) |
| September 30 | 91.9°F (2011) | 19.0°F (1985) | 0.88 in (1977) |