September weather in Big Sandy, MT
The average temperature in Big Sandy in September is 59.0°F (44.2°F–73.7°F). Average precipitation: 1.16 inches.
September is a fall month in Big Sandy, and is warmer than the annual average of 45.1°F. Daily temperatures swing about 29.5°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
73.7°F
Avg Low
44.2°F
Precipitation
1.16 in
Daylight
12h 20m
September records in Big Sandy
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1929) | 28.9°F (1930) | 0.38 in (1973) |
| September 2 | 100.0°F (1940) | 28.0°F (1959) | 0.87 in (1999) |
| September 3 | 104.0°F (2022) | 27.0°F (1962) | 0.30 in (1964) |
| September 4 | 96.1°F (2001) | 25.0°F (1929) | 0.95 in (2016) |
| September 5 | 102.0°F (1967) | 21.9°F (2015) | 0.66 in (1986) |
| September 6 | 99.0°F (1967) | 21.0°F (1929) | 0.89 in (1985) |
| September 7 | 104.0°F (2022) | 25.0°F (1929) | 0.80 in (1941) |
| September 8 | 96.1°F (1981) | 28.0°F (1929) | 0.88 in (1985) |
| September 9 | 95.0°F (1979) | 27.0°F (1962) | 0.80 in (1986) |
| September 10 | 93.9°F (1981) | 30.0°F (1921) | 0.75 in (1928) |
| September 11 | 97.0°F (1969) | 24.1°F (1921) | 1.01 in (1961) |
| September 12 | 93.0°F (1958) | 21.9°F (1989) | 1.30 in (1967) |
| September 13 | 96.1°F (1948) | 25.0°F (1949) | 0.98 in (1967) |
| September 14 | 95.0°F (1935) | 15.1°F (1988) | 0.34 in (1967) |
| September 15 | 93.9°F (2002) | 24.1°F (1970) | 0.83 in (2006) |
| September 16 | 93.9°F (2009) | 26.1°F (1936) | 1.12 in (1954) |
| September 17 | 98.1°F (2009) | 28.0°F (1936) | 1.04 in (1988) |
| September 18 | 96.1°F (1966) | 21.9°F (1965) | 1.14 in (1988) |
| September 19 | 95.0°F (1938) | 21.9°F (1983) | 1.45 in (1925) |
| September 20 | 91.9°F (1938) | 21.0°F (1934) | 1.10 in (1968) |
| September 21 | 95.0°F (1936) | 17.1°F (1995) | 1.70 in (2024) |
| September 22 | 93.9°F (1938) | 24.1°F (1993) | 1.24 in (2016) |
| September 23 | 93.9°F (1992) | 18.0°F (1926) | 0.92 in (1940) |
| September 24 | 93.9°F (2001) | 12.0°F (1926) | 1.65 in (1929) |
| September 25 | 96.1°F (2001) | 21.0°F (1934) | 1.30 in (1986) |
| September 26 | 93.0°F (1963) | 19.0°F (2024) | 0.48 in (1924) |
| September 27 | 90.0°F (1922) | 19.0°F (1928) | 0.91 in (1982) |
| September 28 | 93.0°F (2022) | 19.9°F (1972) | 0.85 in (1954) |
| September 29 | 93.0°F (1967) | 18.0°F (1959) | 0.58 in (2002) |
| September 30 | 93.0°F (1963) | 21.0°F (1974) | 1.12 in (1977) |