September weather in Jackson, WY
The average temperature in Jackson in September is 50.5°F (32.8°F–68.1°F). Average precipitation: 1.59 inches.
September is a fall month in Jackson, and is warmer than the annual average of 38°F. Daily temperatures swing about 35.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 17m. For travel, September is cool.
Avg High
68.1°F
Avg Low
32.8°F
Precipitation
1.59 in
Snow
0.1 in
September records in Jackson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (1950) | 19.9°F (1965) | 0.46 in (1966) |
| September 2 | 90.0°F (1950) | 24.1°F (1952) | 0.67 in (2008) |
| September 3 | 90.0°F (1950) | 21.9°F (1981) | 0.75 in (1929) |
| September 4 | 91.9°F (1924) | 18.0°F (1964) | 1.19 in (1922) |
| September 5 | 91.9°F (1955) | 21.9°F (1956) | 1.60 in (1924) |
| September 6 | 90.0°F (1950) | 19.9°F (1956) | 0.50 in (2001) |
| September 7 | 88.0°F (1955) | 18.0°F (2010) | 1.77 in (2002) |
| September 8 | 87.1°F (1947) | 21.0°F (1976) | 0.71 in (1946) |
| September 9 | 93.0°F (1934) | 15.1°F (1962) | 2.20 in (1924) |
| September 10 | 86.0°F (1959) | 19.9°F (1962) | 2.30 in (1927) |
| September 11 | 86.0°F (1959) | 12.0°F (1916) | 0.79 in (1997) |
| September 12 | 86.0°F (1934) | 17.1°F (2014) | 0.92 in (1942) |
| September 13 | 89.1°F (1990) | 18.0°F (1974) | 0.45 in (1996) |
| September 14 | 86.0°F (1948) | 18.0°F (1974) | 1.16 in (1966) |
| September 15 | 88.0°F (1990) | 16.0°F (1905) | 0.70 in (2015) |
| September 16 | 87.1°F (2000) | 16.0°F (1936) | 1.05 in (2015) |
| September 17 | 87.1°F (1956) | 12.9°F (1936) | 2.00 in (1924) |
| September 18 | 93.0°F (1956) | 14.0°F (1905) | 0.97 in (1961) |
| September 19 | 87.1°F (1956) | 12.9°F (1988) | 0.80 in (1925) |
| September 20 | 86.0°F (1937) | 9.0°F (1983) | 1.00 in (1969) |
| September 21 | 82.9°F (1918) | 12.0°F (1983) | 0.91 in (2023) |
| September 22 | 84.9°F (1905) | 8.1°F (1995) | 1.01 in (1927) |
| September 23 | 84.9°F (1905) | 14.0°F (1956) | 0.82 in (2016) |
| September 24 | 86.0°F (1987) | 16.0°F (1965) | 1.14 in (1934) |
| September 25 | 87.1°F (1956) | 9.0°F (1926) | 0.89 in (2013) |
| September 26 | 84.0°F (2001) | 5.0°F (1926) | 1.09 in (1982) |
| September 27 | 81.0°F (1952) | 15.1°F (1964) | 0.64 in (1972) |
| September 28 | 84.9°F (2001) | 12.9°F (1916) | 0.93 in (2014) |
| September 29 | 82.0°F (1994) | 16.0°F (1939) | 0.95 in (2019) |
| September 30 | 82.9°F (1957) | 9.0°F (1985) | 1.10 in (1926) |