September weather in Garrison, ND
The average temperature in Garrison in September is 58.9°F (46.4°F–71.3°F). Average precipitation: 1.68 inches.
September is a fall month in Garrison, and is warmer than the annual average of 41.5°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
71.3°F
Avg Low
46.4°F
Precipitation
1.68 in
Daylight
12h 19m
September records in Garrison
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1953) | 30.9°F (1981) | 0.87 in (2011) |
| September 2 | 100.0°F (1983) | 34.0°F (1974) | 0.66 in (2000) |
| September 3 | 100.0°F (1948) | 33.1°F (2008) | 1.20 in (2019) |
| September 4 | 98.1°F (1978) | 33.1°F (1984) | 0.62 in (1973) |
| September 5 | 98.1°F (1978) | 37.0°F (1972) | 0.70 in (1990) |
| September 6 | 104.0°F (1978) | 25.0°F (1965) | 1.27 in (1971) |
| September 7 | 99.0°F (1976) | 32.0°F (1965) | 1.77 in (2010) |
| September 8 | 96.1°F (1991) | 27.0°F (2020) | 1.48 in (2019) |
| September 9 | 100.0°F (1959) | 32.0°F (1948) | 1.75 in (2013) |
| September 10 | 97.0°F (1994) | 28.0°F (1965) | 0.95 in (2010) |
| September 11 | 97.0°F (1982) | 23.0°F (1964) | 1.92 in (2003) |
| September 12 | 93.0°F (1990) | 27.0°F (1964) | 1.45 in (1978) |
| September 13 | 96.1°F (2017) | 28.9°F (1989) | 1.56 in (1967) |
| September 14 | 91.9°F (1959) | 25.0°F (1993) | 1.48 in (1954) |
| September 15 | 100.9°F (1948) | 24.1°F (1982) | 0.75 in (2025) |
| September 16 | 86.0°F (1989) | 26.1°F (1973) | 1.86 in (2024) |
| September 17 | 91.0°F (1979) | 26.1°F (1993) | 0.95 in (2005) |
| September 18 | 93.9°F (1989) | 30.0°F (2010) | 0.93 in (1977) |
| September 19 | 87.1°F (2009) | 23.0°F (1991) | 1.59 in (1975) |
| September 20 | 90.0°F (1960) | 25.0°F (1991) | 0.58 in (2011) |
| September 21 | 93.0°F (1960) | 24.1°F (1995) | 2.50 in (1955) |
| September 22 | 82.9°F (2008) | 24.1°F (1983) | 2.01 in (1959) |
| September 23 | 87.1°F (2020) | 24.1°F (1983) | 0.59 in (2023) |
| September 24 | 86.0°F (1949) | 23.0°F (1985) | 1.72 in (1977) |
| September 25 | 91.9°F (1992) | 21.0°F (1984) | 0.72 in (1986) |
| September 26 | 91.0°F (1952) | 23.0°F (1984) | 1.08 in (1981) |
| September 27 | 91.9°F (1963) | 21.0°F (1984) | 0.26 in (2006) |
| September 28 | 89.1°F (1989) | 21.0°F (1984) | 0.71 in (1982) |
| September 29 | 96.1°F (2021) | 21.0°F (1985) | 0.83 in (2019) |
| September 30 | 93.9°F (2024) | 17.1°F (1974) | 0.55 in (2019) |