September weather in Alton, UT
The average temperature in Alton in September is 59.4°F (42.9°F–75.9°F). Average precipitation: 1.70 inches.
September is a fall month in Alton, and is warmer than the annual average of 47.3°F. Daily temperatures swing about 33°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
75.9°F
Avg Low
42.9°F
Precipitation
1.70 in
Daylight
12h 14m
September records in Alton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1950) | 34.0°F (1942) | 1.14 in (1919) |
| September 2 | 91.9°F (2019) | 32.0°F (1973) | 0.72 in (1945) |
| September 3 | 90.0°F (2020) | 32.0°F (1964) | 1.02 in (1929) |
| September 4 | 93.0°F (2020) | 30.9°F (1961) | 1.57 in (1939) |
| September 5 | 90.0°F (1955) | 32.0°F (2004) | 1.52 in (1965) |
| September 6 | 91.0°F (1955) | 30.0°F (1970) | 1.70 in (1939) |
| September 7 | 90.0°F (2020) | 34.0°F (1920) | 1.18 in (1991) |
| September 8 | 88.0°F (1957) | 36.0°F (1920) | 1.08 in (1916) |
| September 9 | 90.0°F (2012) | 27.0°F (1941) | 1.78 in (2014) |
| September 10 | 84.9°F (1959) | 30.0°F (1942) | 0.97 in (1980) |
| September 11 | 87.1°F (2015) | 30.9°F (1986) | 1.37 in (1998) |
| September 12 | 88.0°F (2015) | 28.9°F (1985) | 1.57 in (1939) |
| September 13 | 87.1°F (1983) | 28.0°F (1985) | 1.53 in (1927) |
| September 14 | 87.1°F (2000) | 26.1°F (1993) | 0.72 in (2016) |
| September 15 | 87.1°F (1956) | 27.0°F (1970) | 1.75 in (2015) |
| September 16 | 91.0°F (1956) | 30.9°F (1959) | 0.77 in (1927) |
| September 17 | 88.0°F (1956) | 27.0°F (1996) | 1.61 in (1940) |
| September 18 | 87.1°F (1962) | 19.9°F (1965) | 1.56 in (1963) |
| September 19 | 84.9°F (1962) | 24.1°F (1988) | 2.40 in (1972) |
| September 20 | 88.0°F (1981) | 26.1°F (1978) | 0.41 in (1962) |
| September 21 | 88.0°F (1969) | 24.1°F (1924) | 1.11 in (2022) |
| September 22 | 82.9°F (2001) | 28.9°F (1959) | 1.71 in (2016) |
| September 23 | 86.0°F (2003) | 24.1°F (1941) | 0.92 in (1986) |
| September 24 | 88.0°F (2020) | 25.0°F (2006) | 1.19 in (1967) |
| September 25 | 84.0°F (2010) | 24.1°F (1920) | 1.70 in (1986) |
| September 26 | 84.0°F (2009) | 24.1°F (1934) | 1.05 in (1997) |
| September 27 | 88.0°F (2003) | 24.1°F (1923) | 2.20 in (2014) |
| September 28 | 88.0°F (2010) | 21.9°F (1971) | 2.25 in (1949) |
| September 29 | 86.0°F (2024) | 24.1°F (1930) | 0.69 in (1937) |
| September 30 | 86.0°F (2024) | 25.0°F (2007) | 1.77 in (1983) |