September weather in Alta, UT
The average temperature in Alta in September is 51.7°F (41.1°F–62.2°F). Average precipitation: 2.58 inches. Average snowfall is 2.6 inches.
September is a fall month in Alta, and is warmer than the annual average of 39.1°F. Daily temperatures swing about 21.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
62.2°F
Avg Low
41.1°F
Precipitation
2.58 in
Snow
2.6 in
September records in Alta
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 78.1°F (2019) | 30.0°F (2008) | 1.95 in (2008) |
| September 2 | 78.1°F (2019) | 26.1°F (1973) | 0.61 in (1973) |
| September 3 | 80.1°F (2022) | 28.0°F (1971) | 0.50 in (1999) |
| September 4 | 79.0°F (2022) | 28.9°F (1999) | 1.20 in (2023) |
| September 5 | 81.0°F (2020) | 30.9°F (1970) | 1.25 in (1970) |
| September 6 | 82.0°F (2022) | 28.0°F (1970) | 1.22 in (1972) |
| September 7 | 82.9°F (2022) | 30.0°F (1970) | 1.72 in (1971) |
| September 8 | 79.0°F (2022) | 19.9°F (2020) | 1.75 in (2013) |
| September 9 | 78.1°F (2021) | 24.1°F (2020) | 0.82 in (1991) |
| September 10 | 75.0°F (1974) | 28.9°F (1986) | 1.76 in (2003) |
| September 11 | 77.0°F (1990) | 25.0°F (1988) | 2.02 in (1982) |
| September 12 | 78.1°F (1990) | 25.0°F (1974) | 1.48 in (1985) |
| September 13 | 77.0°F (1990) | 25.0°F (1993) | 0.46 in (1982) |
| September 14 | 78.1°F (1990) | 25.0°F (1982) | 1.23 in (2022) |
| September 15 | 75.9°F (1990) | 23.0°F (1906) | 1.32 in (2017) |
| September 16 | 73.9°F (1990) | 23.0°F (1971) | 2.00 in (2015) |
| September 17 | 75.0°F (1979) | 3.9°F (2010) | 1.60 in (1947) |
| September 18 | 75.9°F (1979) | 17.1°F (1996) | 1.26 in (2002) |
| September 19 | 73.9°F (1979) | 23.0°F (1996) | 1.05 in (1985) |
| September 20 | 73.0°F (1979) | 23.0°F (1983) | 0.78 in (1989) |
| September 21 | 72.0°F (1974) | 19.0°F (1998) | 1.22 in (1998) |
| September 22 | 71.1°F (2015) | 23.0°F (1970) | 0.65 in (2016) |
| September 23 | 73.0°F (2001) | 23.0°F (2017) | 1.26 in (2000) |
| September 24 | 73.9°F (2001) | 19.0°F (2000) | 1.30 in (2016) |
| September 25 | 73.9°F (2015) | 17.1°F (1984) | 2.10 in (1986) |
| September 26 | 72.0°F (2015) | 17.1°F (1984) | 1.28 in (1982) |
| September 27 | 72.0°F (1974) | 24.1°F (1999) | 3.43 in (1982) |
| September 28 | 73.0°F (2010) | 17.1°F (1971) | 1.20 in (1982) |
| September 29 | 73.0°F (2024) | 18.0°F (1986) | 1.46 in (1982) |
| September 30 | 73.0°F (1906) | 16.0°F (2007) | 1.51 in (1982) |