September weather in Bloomington, ID
The average temperature in Bloomington in September is 54.6°F (39.2°F–70.0°F). Average precipitation: 1.09 inches.
September is a fall month in Bloomington, and is warmer than the annual average of 41°F. Daily temperatures swing about 30.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
70.0°F
Avg Low
39.2°F
Precipitation
1.09 in
Snow
0.1 in
September records in Bloomington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (1948) | 33.1°F (1926) | 0.80 in (2008) |
| September 2 | 89.1°F (2022) | 30.0°F (2008) | 0.63 in (1983) |
| September 3 | 88.0°F (1950) | 30.9°F (1961) | 0.82 in (2004) |
| September 4 | 89.1°F (1950) | 32.0°F (1961) | 0.49 in (1925) |
| September 5 | 91.0°F (2022) | 30.0°F (1956) | 0.80 in (2007) |
| September 6 | 91.0°F (2022) | 30.0°F (1996) | 1.26 in (1965) |
| September 7 | 89.1°F (2020) | 30.0°F (1996) | 0.33 in (1980) |
| September 8 | 91.0°F (2022) | 28.0°F (1976) | 0.81 in (2002) |
| September 9 | 84.9°F (2005) | 25.0°F (1962) | 0.70 in (2019) |
| September 10 | 84.9°F (1990) | 28.0°F (2020) | 0.66 in (1950) |
| September 11 | 84.9°F (1959) | 25.0°F (1994) | 0.92 in (2019) |
| September 12 | 84.9°F (1990) | 28.0°F (1951) | 0.67 in (1942) |
| September 13 | 89.1°F (1990) | 26.1°F (1979) | 0.28 in (1958) |
| September 14 | 84.0°F (1990) | 25.0°F (1993) | 0.90 in (1982) |
| September 15 | 87.1°F (1990) | 24.1°F (1970) | 0.45 in (1965) |
| September 16 | 84.0°F (2000) | 25.0°F (1936) | 0.76 in (1963) |
| September 17 | 82.9°F (2000) | 26.1°F (1965) | 1.15 in (1978) |
| September 18 | 82.0°F (1928) | 19.9°F (1965) | 0.68 in (1961) |
| September 19 | 84.9°F (1937) | 19.9°F (1965) | 0.55 in (1955) |
| September 20 | 81.0°F (1930) | 21.9°F (1978) | 0.46 in (1990) |
| September 21 | 82.0°F (1935) | 21.0°F (1970) | 1.14 in (1997) |
| September 22 | 81.0°F (2001) | 24.1°F (1955) | 0.66 in (1931) |
| September 23 | 81.0°F (2001) | 24.1°F (1946) | 0.90 in (1984) |
| September 24 | 82.0°F (1943) | 21.0°F (2000) | 0.93 in (1923) |
| September 25 | 84.0°F (2001) | 14.0°F (1926) | 0.67 in (1955) |
| September 26 | 82.9°F (2015) | 21.9°F (1934) | 1.64 in (1982) |
| September 27 | 82.0°F (2009) | 21.0°F (1934) | 0.55 in (1983) |
| September 28 | 82.0°F (2001) | 19.9°F (1999) | 1.28 in (2014) |
| September 29 | 84.0°F (2010) | 19.0°F (1985) | 1.30 in (2019) |
| September 30 | 81.0°F (2024) | 19.0°F (1985) | 0.86 in (1982) |