September weather in Sundance, WY
The average temperature in Sundance in September is 58.1°F (44.8°F–71.4°F). Average precipitation: 1.32 inches. Average snowfall is 0.9 inches.
September is a fall month in Sundance, and is warmer than the annual average of 43.8°F. Daily temperatures swing about 26.6°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
71.4°F
Avg Low
44.8°F
Precipitation
1.32 in
Snow
0.9 in
September records in Sundance
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1915) | 34.0°F (1924) | 1.25 in (1963) |
| September 2 | 95.0°F (1897) | 32.0°F (1959) | 1.15 in (1919) |
| September 3 | 98.1°F (2005) | 28.9°F (1961) | 1.05 in (1951) |
| September 4 | 99.0°F (1933) | 28.9°F (1962) | 0.95 in (1951) |
| September 5 | 96.1°F (1931) | 32.0°F (1918) | 1.33 in (1971) |
| September 6 | 96.1°F (1933) | 28.9°F (1929) | 0.74 in (1946) |
| September 7 | 93.9°F (1931) | 30.0°F (1929) | 0.75 in (1941) |
| September 8 | 96.1°F (1959) | 26.1°F (2020) | 0.92 in (1926) |
| September 9 | 91.9°F (1979) | 25.0°F (2020) | 1.43 in (2002) |
| September 10 | 93.0°F (2012) | 27.0°F (1921) | 0.79 in (1986) |
| September 11 | 88.0°F (1959) | 18.0°F (1921) | 0.87 in (1947) |
| September 12 | 99.0°F (1919) | 27.0°F (1961) | 1.32 in (1980) |
| September 13 | 93.0°F (1895) | 26.1°F (1970) | 1.60 in (1998) |
| September 14 | 91.0°F (1955) | 21.0°F (1993) | 1.00 in (1967) |
| September 15 | 88.0°F (1997) | 21.9°F (1916) | 1.20 in (2017) |
| September 16 | 90.0°F (1919) | 25.0°F (1897) | 0.84 in (1967) |
| September 17 | 91.0°F (1919) | 24.1°F (1965) | 0.70 in (1923) |
| September 18 | 96.1°F (1998) | 0.0°F (1917) | 0.88 in (1946) |
| September 19 | 90.0°F (1937) | 24.1°F (1965) | 0.45 in (1995) |
| September 20 | 93.0°F (1956) | 19.9°F (1927) | 1.29 in (1989) |
| September 21 | 89.1°F (1922) | 16.0°F (1995) | 0.85 in (1941) |
| September 22 | 91.0°F (1936) | 23.0°F (1895) | 1.00 in (2006) |
| September 23 | 88.0°F (1958) | 21.0°F (1926) | 2.27 in (2017) |
| September 24 | 86.0°F (2014) | 12.0°F (1926) | 1.64 in (1986) |
| September 25 | 91.0°F (2014) | 6.1°F (1926) | 1.30 in (1929) |
| September 26 | 91.0°F (2014) | 12.9°F (1942) | 1.00 in (1966) |
| September 27 | 89.1°F (2021) | 19.9°F (1942) | 0.48 in (1929) |
| September 28 | 88.0°F (1952) | 19.9°F (1985) | 1.00 in (1923) |
| September 29 | 86.0°F (1938) | 19.9°F (1912) | 1.50 in (1923) |
| September 30 | 88.0°F (1911) | 19.0°F (1985) | 1.07 in (2014) |