September weather in St. Martin, MN
The average temperature in St. Martin in September is 59.0°F (47.9°F–70.2°F). Average precipitation: 2.78 inches.
September is a fall month in St. Martin, and is warmer than the annual average of 42°F. Daily temperatures swing about 22.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
70.2°F
Avg Low
47.9°F
Precipitation
2.78 in
Daylight
12h 18m
September records in St. Martin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1960) | 33.1°F (1974) | 0.64 in (1988) |
| September 2 | 93.9°F (1983) | 39.9°F (1968) | 1.70 in (2006) |
| September 3 | 93.0°F (1960) | 28.9°F (1974) | 2.95 in (2005) |
| September 4 | 91.9°F (1978) | 35.1°F (1974) | 2.60 in (1989) |
| September 5 | 93.9°F (1960) | 34.0°F (1962) | 1.50 in (2004) |
| September 6 | 95.0°F (1978) | 37.9°F (1988) | 0.21 in (2016) |
| September 7 | 98.1°F (1978) | 37.0°F (1986) | 1.17 in (1981) |
| September 8 | 95.0°F (1978) | 36.0°F (1995) | 2.30 in (1991) |
| September 9 | 90.0°F (1978) | 36.0°F (2008) | 2.56 in (1974) |
| September 10 | 91.0°F (1998) | 33.1°F (2020) | 1.90 in (1983) |
| September 11 | 90.0°F (1988) | 33.1°F (2020) | 0.62 in (1980) |
| September 12 | 88.0°F (1976) | 32.0°F (2007) | 3.26 in (1980) |
| September 13 | 90.0°F (1990) | 30.9°F (1963) | 1.75 in (1978) |
| September 14 | 88.0°F (1990) | 33.1°F (1996) | 1.48 in (1978) |
| September 15 | 88.0°F (2017) | 28.0°F (2007) | 1.42 in (2004) |
| September 16 | 91.9°F (2018) | 32.0°F (2007) | 1.38 in (2010) |
| September 17 | 91.0°F (2018) | 35.1°F (1981) | 1.30 in (1986) |
| September 18 | 91.0°F (1998) | 30.9°F (1993) | 1.55 in (2007) |
| September 19 | 93.9°F (1984) | 30.9°F (1991) | 2.00 in (1957) |
| September 20 | 88.0°F (2021) | 28.9°F (1962) | 1.42 in (1993) |
| September 21 | 82.9°F (1984) | 30.9°F (1985) | 2.79 in (2007) |
| September 22 | 82.9°F (2015) | 19.9°F (1974) | 1.31 in (1986) |
| September 23 | 88.0°F (2017) | 28.0°F (1973) | 2.46 in (1968) |
| September 24 | 84.9°F (2007) | 25.0°F (2000) | 2.83 in (1984) |
| September 25 | 82.9°F (1979) | 26.1°F (1961) | 1.72 in (2016) |
| September 26 | 86.0°F (1974) | 21.0°F (1965) | 0.90 in (1999) |
| September 27 | 87.1°F (1983) | 28.0°F (1991) | 0.55 in (1973) |
| September 28 | 84.0°F (2000) | 23.0°F (1961) | 0.33 in (1971) |
| September 29 | 87.1°F (2024) | 25.0°F (1992) | 1.20 in (1988) |
| September 30 | 88.0°F (1976) | 26.1°F (1972) | 2.73 in (1965) |