September weather in Monticello, MN
The average temperature in Monticello in September is 60.8°F (50.5°F–71.1°F). Average precipitation: 3.39 inches.
September is a fall month in Monticello, and is warmer than the annual average of 43.8°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
71.1°F
Avg Low
50.5°F
Precipitation
3.39 in
Daylight
12h 18m
September records in Monticello
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1960) | 35.1°F (1974) | 1.64 in (1973) |
| September 2 | 93.9°F (1961) | 42.1°F (1974) | 2.05 in (2010) |
| September 3 | 91.0°F (1960) | 32.0°F (1974) | 1.10 in (1986) |
| September 4 | 90.0°F (1960) | 39.0°F (1974) | 1.12 in (1989) |
| September 5 | 90.0°F (1960) | 36.0°F (1962) | 1.09 in (2005) |
| September 6 | 93.0°F (1978) | 39.0°F (1988) | 6.31 in (2002) |
| September 7 | 96.1°F (1976) | 41.0°F (1979) | 1.00 in (2007) |
| September 8 | 95.0°F (1978) | 39.9°F (1995) | 2.90 in (1991) |
| September 9 | 93.0°F (1978) | 37.0°F (1962) | 2.44 in (1991) |
| September 10 | 90.0°F (1978) | 39.9°F (1967) | 1.75 in (1982) |
| September 11 | 90.0°F (1978) | 37.0°F (1992) | 2.38 in (2003) |
| September 12 | 93.0°F (2012) | 36.0°F (1975) | 5.39 in (2005) |
| September 13 | 89.1°F (1990) | 32.0°F (1963) | 0.62 in (1941) |
| September 14 | 91.9°F (1998) | 36.0°F (1996) | 1.18 in (1978) |
| September 15 | 84.0°F (1994) | 32.0°F (1964) | 0.91 in (1983) |
| September 16 | 84.9°F (2012) | 32.0°F (2007) | 1.53 in (2006) |
| September 17 | 86.0°F (1988) | 32.0°F (2007) | 1.85 in (1997) |
| September 18 | 86.0°F (1974) | 34.0°F (1993) | 1.05 in (2005) |
| September 19 | 91.9°F (1984) | 35.1°F (1971) | 1.90 in (1976) |
| September 20 | 91.0°F (1998) | 30.9°F (1991) | 1.82 in (1972) |
| September 21 | 84.0°F (1984) | 33.1°F (1995) | 1.77 in (2007) |
| September 22 | 80.1°F (2004) | 26.1°F (1974) | 1.35 in (1959) |
| September 23 | 80.1°F (1987) | 30.0°F (1983) | 1.30 in (1964) |
| September 24 | 82.9°F (2007) | 28.9°F (2000) | 2.36 in (2010) |
| September 25 | 82.0°F (1967) | 28.9°F (2000) | 0.79 in (1972) |
| September 26 | 86.0°F (1974) | 25.0°F (1965) | 0.93 in (1973) |
| September 27 | 88.0°F (1987) | 27.0°F (2012) | 0.36 in (2007) |
| September 28 | 84.9°F (1983) | 28.0°F (1967) | 0.48 in (1988) |
| September 29 | 82.0°F (1983) | 27.0°F (1992) | 0.75 in (1941) |
| September 30 | 82.9°F (1971) | 30.0°F (1972) | 1.26 in (1965) |