September weather in Afton, WY
The average temperature in Afton in September is 51.9°F (34.4°F–69.3°F). Average precipitation: 1.52 inches. Average snowfall is 0.2 inches.
September is a fall month in Afton, and is warmer than the annual average of 38.5°F. Daily temperatures swing about 34.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 16m. For travel, September is cool.
Avg High
69.3°F
Avg Low
34.4°F
Precipitation
1.52 in
Snow
0.2 in
September records in Afton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2016) | 26.1°F (1962) | 0.44 in (1966) |
| September 2 | 88.0°F (1990) | 26.1°F (1959) | 0.55 in (1985) |
| September 3 | 89.1°F (1967) | 24.1°F (1959) | 0.63 in (1971) |
| September 4 | 90.0°F (2022) | 24.1°F (1974) | 0.55 in (2023) |
| September 5 | 93.0°F (1967) | 25.0°F (1975) | 1.20 in (2007) |
| September 6 | 90.0°F (1967) | 23.0°F (1996) | 0.81 in (1970) |
| September 7 | 89.1°F (2022) | 25.0°F (1974) | 0.58 in (1999) |
| September 8 | 91.9°F (2022) | 19.9°F (1977) | 1.10 in (1991) |
| September 9 | 87.1°F (1959) | 14.0°F (1962) | 0.76 in (2002) |
| September 10 | 88.0°F (1959) | 23.0°F (1962) | 0.81 in (1982) |
| September 11 | 88.0°F (1967) | 21.0°F (1988) | 0.75 in (1997) |
| September 12 | 90.0°F (1990) | 17.1°F (1974) | 0.64 in (1985) |
| September 13 | 90.0°F (1990) | 19.0°F (1967) | 0.57 in (1958) |
| September 14 | 89.1°F (1990) | 21.0°F (1974) | 0.64 in (1966) |
| September 15 | 87.1°F (1990) | 19.9°F (1970) | 0.74 in (2017) |
| September 16 | 90.0°F (1990) | 21.0°F (1971) | 1.07 in (2015) |
| September 17 | 84.9°F (2000) | 19.0°F (1971) | 1.02 in (1990) |
| September 18 | 84.9°F (1962) | 12.0°F (1965) | 0.97 in (1978) |
| September 19 | 82.9°F (1962) | 17.1°F (1988) | 0.94 in (2017) |
| September 20 | 80.1°F (1962) | 10.9°F (1983) | 0.76 in (1990) |
| September 21 | 80.1°F (1967) | 15.1°F (1983) | 0.98 in (1969) |
| September 22 | 82.0°F (1987) | 18.0°F (1995) | 0.87 in (2008) |
| September 23 | 84.9°F (1987) | 17.1°F (1996) | 1.51 in (1984) |
| September 24 | 86.0°F (1987) | 21.0°F (1996) | 0.94 in (2016) |
| September 25 | 86.0°F (1987) | 18.0°F (1958) | 1.13 in (2017) |
| September 26 | 84.9°F (2001) | 19.9°F (1970) | 1.50 in (1982) |
| September 27 | 80.1°F (1960) | 18.0°F (1996) | 0.48 in (1986) |
| September 28 | 82.9°F (2001) | 17.1°F (1999) | 1.34 in (2014) |
| September 29 | 84.0°F (1994) | 12.0°F (1985) | 1.33 in (2019) |
| September 30 | 82.0°F (1957) | 12.0°F (1985) | 0.49 in (2014) |