September weather in Deer Lodge, MT
The average temperature in Deer Lodge in September is 52.1°F (34.6°F–69.6°F). Average precipitation: 1.35 inches.
September is a fall month in Deer Lodge, and is warmer than the annual average of 40.3°F. Daily temperatures swing about 35°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is cool.
Avg High
69.6°F
Avg Low
34.6°F
Precipitation
1.35 in
Daylight
12h 19m
September records in Deer Lodge
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (1967) | 19.9°F (1995) | 0.47 in (1963) |
| September 2 | 93.0°F (1991) | 24.1°F (1974) | 0.36 in (1961) |
| September 3 | 93.9°F (1991) | 27.0°F (1975) | 0.44 in (1985) |
| September 4 | 98.1°F (2022) | 24.1°F (1969) | 0.50 in (1997) |
| September 5 | 93.9°F (1967) | 24.1°F (1969) | 0.68 in (1995) |
| September 6 | 93.0°F (1967) | 21.9°F (1984) | 0.42 in (1976) |
| September 7 | 90.0°F (2022) | -6.0°F (1984) | 1.04 in (2015) |
| September 8 | 95.0°F (2022) | 19.0°F (1960) | 1.18 in (1995) |
| September 9 | 93.9°F (2021) | 17.1°F (2016) | 0.98 in (2019) |
| September 10 | 91.0°F (1994) | 21.9°F (1983) | 0.60 in (1998) |
| September 11 | 91.0°F (1994) | 21.0°F (2014) | 1.03 in (1980) |
| September 12 | 89.1°F (1990) | 14.0°F (2016) | 0.95 in (1985) |
| September 13 | 88.0°F (1959) | 19.9°F (1974) | 0.32 in (2004) |
| September 14 | 87.1°F (1990) | 12.9°F (1970) | 0.77 in (1996) |
| September 15 | 93.0°F (2000) | 16.0°F (1970) | 0.65 in (1977) |
| September 16 | 87.1°F (1990) | 21.0°F (1970) | 0.52 in (1996) |
| September 17 | 90.0°F (1981) | 12.0°F (1965) | 0.52 in (1977) |
| September 18 | 91.0°F (1981) | 12.9°F (1965) | 0.61 in (1976) |
| September 19 | 88.0°F (1981) | 19.0°F (1965) | 0.56 in (2005) |
| September 20 | 87.1°F (1984) | 10.0°F (1983) | 1.53 in (1968) |
| September 21 | 86.0°F (1967) | 14.0°F (1983) | 0.33 in (1984) |
| September 22 | 86.0°F (1967) | 17.1°F (1960) | 0.43 in (1965) |
| September 23 | 84.9°F (1966) | 10.9°F (2016) | 0.25 in (1963) |
| September 24 | 88.0°F (2001) | 3.9°F (1997) | 0.75 in (2007) |
| September 25 | 90.0°F (2001) | 12.9°F (2000) | 0.25 in (1981) |
| September 26 | 87.1°F (2001) | 15.1°F (1964) | 0.34 in (2005) |
| September 27 | 84.0°F (1963) | 19.0°F (1964) | 0.70 in (1982) |
| September 28 | 86.0°F (2024) | 15.1°F (1999) | 0.38 in (2014) |
| September 29 | 87.1°F (1967) | 9.0°F (1985) | 0.40 in (2019) |
| September 30 | 87.1°F (1967) | 12.0°F (1985) | 0.26 in (2000) |