September weather in Sunburst, MT
The average temperature in Sunburst in September is 56.8°F (43.8°F–69.8°F). Average precipitation: 1.17 inches.
September is a fall month in Sunburst, and is warmer than the annual average of 43.3°F. Daily temperatures swing about 26°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
69.8°F
Avg Low
43.8°F
Precipitation
1.17 in
Daylight
12h 20m
September records in Sunburst
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (1998) | 37.0°F (1993) | 0.51 in (1959) |
| September 2 | 96.1°F (1998) | 34.0°F (2008) | 0.53 in (1961) |
| September 3 | 93.0°F (1998) | 32.0°F (2011) | 0.30 in (1999) |
| September 4 | 93.9°F (2003) | 36.0°F (1985) | 1.51 in (1965) |
| September 5 | 91.0°F (1990) | 35.1°F (1992) | 0.60 in (1996) |
| September 6 | 91.9°F (1998) | 28.0°F (1992) | 0.81 in (1985) |
| September 7 | 93.0°F (1998) | 30.0°F (1992) | 0.62 in (2002) |
| September 8 | 95.0°F (1981) | 32.0°F (1988) | 0.71 in (2013) |
| September 9 | 93.0°F (1981) | 28.9°F (1992) | 0.90 in (2010) |
| September 10 | 87.1°F (1994) | 27.0°F (1989) | 1.20 in (2005) |
| September 11 | 90.0°F (1981) | 28.9°F (1989) | 1.00 in (1988) |
| September 12 | 86.0°F (1990) | 32.0°F (1989) | 1.61 in (1978) |
| September 13 | 84.0°F (1998) | 25.0°F (1982) | 0.28 in (1978) |
| September 14 | 91.9°F (1990) | 28.9°F (2007) | 0.62 in (2006) |
| September 15 | 90.0°F (2000) | 33.1°F (1982) | 0.78 in (1993) |
| September 16 | 88.0°F (2009) | 30.0°F (2003) | 1.06 in (1954) |
| September 17 | 91.0°F (1981) | 28.0°F (2003) | 1.13 in (1996) |
| September 18 | 89.1°F (1981) | 26.1°F (1983) | 0.64 in (1996) |
| September 19 | 89.1°F (2009) | 21.9°F (1983) | 0.45 in (2007) |
| September 20 | 90.0°F (2009) | 25.0°F (1983) | 1.18 in (1968) |
| September 21 | 84.9°F (1987) | 21.0°F (1995) | 0.81 in (1968) |
| September 22 | 90.0°F (1994) | 24.1°F (2000) | 0.32 in (1965) |
| September 23 | 91.0°F (1990) | 19.9°F (2000) | 1.00 in (2007) |
| September 24 | 91.0°F (2009) | 24.1°F (1984) | 0.94 in (1951) |
| September 25 | 89.1°F (2001) | 26.1°F (1984) | 0.72 in (1986) |
| September 26 | 87.1°F (2011) | 26.1°F (1996) | 0.35 in (1999) |
| September 27 | 82.9°F (1989) | 25.0°F (1984) | 1.73 in (1982) |
| September 28 | 82.0°F (1991) | 21.9°F (1983) | 0.80 in (1954) |
| September 29 | 86.0°F (1992) | 21.0°F (1985) | 0.38 in (1982) |
| September 30 | 86.0°F (2011) | 24.1°F (1985) | 0.35 in (1977) |