September weather in Salmon, ID
The average temperature in Salmon in September is 57.4°F (40.6°F–74.3°F). Average precipitation: 0.79 inches.
September is a fall month in Salmon, and is warmer than the annual average of 44.4°F. Daily temperatures swing about 33.7°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
74.3°F
Avg Low
40.6°F
Precipitation
0.79 in
Daylight
12h 18m
September records in Salmon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1991) | 35.1°F (1969) | 0.36 in (2000) |
| September 2 | 95.0°F (1969) | 33.1°F (1974) | 0.62 in (1999) |
| September 3 | 97.0°F (1988) | 35.1°F (1975) | 0.21 in (2024) |
| September 4 | 93.0°F (2025) | 33.1°F (1969) | 0.82 in (2023) |
| September 5 | 97.0°F (2019) | 34.0°F (1969) | 0.60 in (2015) |
| September 6 | 98.1°F (2020) | 32.0°F (1969) | 0.94 in (2001) |
| September 7 | 93.0°F (1977) | 28.0°F (1992) | 0.55 in (2019) |
| September 8 | 97.0°F (2022) | 28.9°F (2020) | 0.82 in (1986) |
| September 9 | 91.9°F (1981) | 28.9°F (1976) | 0.90 in (2010) |
| September 10 | 91.0°F (1981) | 28.9°F (2020) | 0.65 in (2010) |
| September 11 | 89.1°F (1981) | 32.0°F (2005) | 0.89 in (1997) |
| September 12 | 91.0°F (1981) | 28.9°F (2014) | 0.51 in (1985) |
| September 13 | 90.0°F (1981) | 28.9°F (1974) | 0.22 in (2024) |
| September 14 | 90.0°F (1990) | 27.0°F (1970) | 0.20 in (1986) |
| September 15 | 95.0°F (2000) | 26.1°F (1970) | 0.28 in (2017) |
| September 16 | 93.9°F (1990) | 28.0°F (1970) | 0.42 in (2006) |
| September 17 | 90.0°F (1981) | 28.9°F (2021) | 0.40 in (1977) |
| September 18 | 91.0°F (1981) | 25.0°F (1971) | 0.68 in (1976) |
| September 19 | 89.1°F (1979) | 26.1°F (1971) | 0.28 in (2004) |
| September 20 | 91.9°F (2009) | 21.0°F (1983) | 0.45 in (1969) |
| September 21 | 89.1°F (1979) | 26.1°F (1971) | 0.30 in (2023) |
| September 22 | 86.0°F (1979) | 24.1°F (1971) | 0.20 in (2016) |
| September 23 | 96.1°F (2024) | 25.0°F (1996) | 0.50 in (2007) |
| September 24 | 87.1°F (1987) | 27.0°F (1972) | 0.20 in (2007) |
| September 25 | 90.0°F (2014) | 21.9°F (1970) | 0.38 in (1981) |
| September 26 | 91.0°F (2024) | 23.0°F (1972) | 0.37 in (1982) |
| September 27 | 86.0°F (2024) | 28.0°F (1970) | 0.24 in (1982) |
| September 28 | 86.0°F (2011) | 21.9°F (1999) | 0.18 in (1982) |
| September 29 | 86.0°F (2024) | 21.9°F (1985) | 0.33 in (1982) |
| September 30 | 86.0°F (2024) | 19.9°F (1985) | 0.51 in (2013) |