September weather in Grantsville, UT
The average temperature in Grantsville in September is 64.4°F (50.1°F–78.6°F). Average precipitation: 0.90 inches.
September is a fall month in Grantsville, and is warmer than the annual average of 51.2°F. Daily temperatures swing about 28.5°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
78.6°F
Avg Low
50.1°F
Precipitation
0.90 in
Daylight
12h 15m
September records in Grantsville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (2022) | 44.1°F (2018) | 0.65 in (1906) |
| September 2 | 98.1°F (2004) | 43.0°F (2008) | 0.25 in (1913) |
| September 3 | 96.1°F (2022) | 42.1°F (2016) | 1.34 in (1915) |
| September 4 | 99.0°F (2022) | 45.0°F (2004) | 0.82 in (2013) |
| September 5 | 99.0°F (2022) | 36.0°F (2016) | 0.70 in (1909) |
| September 6 | 99.0°F (2022) | 41.0°F (2010) | 0.61 in (1981) |
| September 7 | 100.9°F (2022) | 42.1°F (2001) | 1.10 in (1908) |
| September 8 | 102.0°F (2022) | 19.9°F (2003) | 0.24 in (1967) |
| September 9 | 98.1°F (2022) | 37.0°F (2001) | 0.50 in (1912) |
| September 10 | 93.0°F (2021) | 27.0°F (2016) | 0.19 in (1982) |
| September 11 | 95.0°F (2021) | 28.0°F (2016) | 0.44 in (1982) |
| September 12 | 90.0°F (2004) | 39.0°F (2010) | 0.42 in (1991) |
| September 13 | 89.1°F (2004) | 41.0°F (2018) | 0.51 in (1940) |
| September 14 | 89.1°F (2015) | 37.0°F (2016) | 0.53 in (2013) |
| September 15 | 91.9°F (2018) | 39.9°F (2016) | 0.38 in (1959) |
| September 16 | 91.9°F (2018) | 32.0°F (2016) | 0.80 in (2006) |
| September 17 | 95.0°F (2000) | 37.0°F (2006) | 1.14 in (2015) |
| September 18 | 91.9°F (2014) | 36.0°F (2006) | 1.12 in (1978) |
| September 19 | 91.0°F (2014) | 36.0°F (2003) | 0.54 in (1985) |
| September 20 | 93.9°F (2010) | 37.0°F (2003) | 0.99 in (1989) |
| September 21 | 90.0°F (2022) | 35.1°F (2018) | 0.90 in (1925) |
| September 22 | 84.9°F (2001) | 36.0°F (2017) | 0.54 in (1929) |
| September 23 | 89.1°F (2020) | 36.0°F (2004) | 1.08 in (2000) |
| September 24 | 87.1°F (2001) | 32.0°F (2000) | 0.92 in (1984) |
| September 25 | 91.9°F (2020) | 32.0°F (2000) | 1.35 in (1908) |
| September 26 | 91.9°F (2001) | 35.1°F (2000) | 1.89 in (1982) |
| September 27 | 89.1°F (2015) | 36.0°F (2017) | 0.42 in (1923) |
| September 28 | 91.0°F (2001) | 37.9°F (2013) | 0.87 in (1982) |
| September 29 | 88.0°F (2024) | 39.9°F (2013) | 0.48 in (2019) |
| September 30 | 96.1°F (2024) | 33.1°F (2007) | 0.70 in (1926) |