September weather in Shelley, ID
The average temperature in Shelley in September is 57.7°F (40.6°F–74.8°F). Average precipitation: 0.97 inches.
September is a fall month in Shelley, and is warmer than the annual average of 44.2°F. Daily temperatures swing about 34.2°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
74.8°F
Avg Low
40.6°F
Precipitation
0.97 in
Daylight
12h 17m
September records in Shelley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2022) | 32.0°F (1965) | 0.72 in (2000) |
| September 2 | 96.1°F (1950) | 33.1°F (1975) | 0.33 in (1985) |
| September 3 | 100.0°F (2022) | 30.0°F (1964) | 0.02 in (1949) |
| September 4 | 97.0°F (2022) | 30.9°F (1965) | 0.16 in (1992) |
| September 5 | 97.0°F (2020) | 33.1°F (1965) | 0.20 in (1970) |
| September 6 | 99.0°F (2022) | 31.1°F (2010) | 0.71 in (2002) |
| September 7 | 99.0°F (2022) | 30.0°F (1992) | 0.39 in (2020) |
| September 8 | 91.9°F (2021) | 28.9°F (2001) | 0.57 in (1950) |
| September 9 | 95.0°F (2021) | 26.1°F (1962) | 0.76 in (1961) |
| September 10 | 95.0°F (1959) | 29.1°F (2020) | 0.33 in (2019) |
| September 11 | 93.0°F (1990) | 32.0°F (1964) | 1.03 in (1978) |
| September 12 | 91.0°F (1990) | 24.3°F (2014) | 0.81 in (1998) |
| September 13 | 91.0°F (1948) | 28.9°F (1989) | 0.51 in (2001) |
| September 14 | 93.9°F (1990) | 28.0°F (1993) | 0.87 in (2017) |
| September 15 | 91.0°F (2000) | 26.1°F (1970) | 0.73 in (2006) |
| September 16 | 89.1°F (2000) | 28.9°F (1965) | 0.20 in (2011) |
| September 17 | 90.0°F (2014) | 24.1°F (1965) | 0.72 in (2024) |
| September 18 | 90.0°F (1956) | 21.0°F (1965) | 0.66 in (1961) |
| September 19 | 90.0°F (1956) | 21.9°F (1965) | 0.48 in (1948) |
| September 20 | 86.0°F (2022) | 18.0°F (1983) | 0.54 in (1963) |
| September 21 | 86.0°F (1966) | 21.9°F (1983) | 1.03 in (2006) |
| September 22 | 87.1°F (1966) | 25.0°F (1971) | 0.34 in (2016) |
| September 23 | 88.0°F (1987) | 23.0°F (1985) | 1.01 in (2016) |
| September 24 | 88.0°F (1987) | 18.0°F (2000) | 0.11 in (2005) |
| September 25 | 89.1°F (2001) | 21.0°F (1970) | 0.17 in (1948) |
| September 26 | 87.1°F (1963) | 26.1°F (1970) | 0.63 in (1982) |
| September 27 | 86.0°F (1969) | 24.1°F (1964) | 0.98 in (2014) |
| September 28 | 89.1°F (2024) | 18.0°F (1999) | 0.88 in (2014) |
| September 29 | 89.1°F (1957) | 18.0°F (1985) | 0.51 in (1983) |
| September 30 | 90.0°F (1957) | 18.0°F (1985) | 0.77 in (1971) |