September weather in Ashton, ID
The average temperature in Ashton in September is 57.1°F (41.8°F–72.5°F). Average precipitation: 1.17 inches.
September is a fall month in Ashton, and is warmer than the annual average of 43.4°F. Daily temperatures swing about 30.7°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
72.5°F
Avg Low
41.8°F
Precipitation
1.17 in
Daylight
12h 17m
September records in Ashton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (2022) | 28.0°F (1905) | 1.10 in (1909) |
| September 2 | 93.0°F (1950) | 30.0°F (1926) | 0.31 in (1985) |
| September 3 | 95.0°F (1950) | 25.0°F (1964) | 0.52 in (1971) |
| September 4 | 97.0°F (1932) | 23.0°F (1969) | 0.90 in (2023) |
| September 5 | 91.9°F (2022) | 27.0°F (1969) | 1.60 in (1930) |
| September 6 | 93.0°F (1903) | 28.0°F (2010) | 0.89 in (2002) |
| September 7 | 93.9°F (2022) | 18.0°F (2001) | 0.93 in (1971) |
| September 8 | 93.9°F (2022) | 19.9°F (1897) | 1.20 in (1925) |
| September 9 | 95.0°F (2022) | 21.9°F (1962) | 0.95 in (1950) |
| September 10 | 89.1°F (1917) | 25.0°F (1901) | 0.58 in (1997) |
| September 11 | 88.0°F (1959) | 25.0°F (1906) | 0.76 in (1997) |
| September 12 | 89.1°F (1934) | 24.1°F (1906) | 1.13 in (1985) |
| September 13 | 87.1°F (1948) | 26.1°F (1941) | 1.20 in (1998) |
| September 14 | 84.9°F (1946) | 18.0°F (1915) | 0.90 in (1906) |
| September 15 | 87.1°F (1920) | 19.0°F (1936) | 1.50 in (1914) |
| September 16 | 90.0°F (1920) | 21.0°F (1936) | 0.61 in (2006) |
| September 17 | 87.1°F (1937) | 19.9°F (1949) | 0.94 in (1998) |
| September 18 | 99.0°F (1931) | 16.0°F (1905) | 0.68 in (1947) |
| September 19 | 86.0°F (1920) | 19.9°F (1965) | 1.26 in (1948) |
| September 20 | 91.9°F (1937) | 15.1°F (1983) | 0.65 in (1914) |
| September 21 | 88.0°F (1937) | 18.0°F (1951) | 1.22 in (1945) |
| September 22 | 86.0°F (1898) | 19.9°F (1971) | 0.50 in (2017) |
| September 23 | 90.0°F (1905) | 21.0°F (1946) | 1.42 in (2019) |
| September 24 | 87.1°F (1898) | 12.9°F (1926) | 0.40 in (1905) |
| September 25 | 87.1°F (2015) | 10.9°F (1926) | 0.71 in (1909) |
| September 26 | 84.9°F (1898) | 19.9°F (1926) | 0.95 in (1915) |
| September 27 | 86.0°F (1898) | 16.0°F (1999) | 0.62 in (1983) |
| September 28 | 87.1°F (1898) | 12.0°F (1999) | 0.87 in (1927) |
| September 29 | 86.0°F (1938) | 10.0°F (1898) | 1.50 in (2014) |
| September 30 | 84.0°F (1957) | 10.9°F (1898) | 1.30 in (1949) |