September weather in Riverdale, UT
The average temperature in Riverdale in September is 65.4°F (53.0°F–77.8°F). Average precipitation: 1.06 inches.
September is a fall month in Riverdale, and is warmer than the annual average of 51.7°F. Daily temperatures swing about 24.8°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
77.8°F
Avg Low
53.0°F
Precipitation
1.06 in
Daylight
12h 16m
September records in Riverdale
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (2022) | 46.0°F (2008) | 1.34 in (2012) |
| September 2 | 97.0°F (2022) | 44.1°F (2008) | 0.05 in (2013) |
| September 3 | 100.9°F (2022) | 46.0°F (2004) | 0.68 in (2004) |
| September 4 | 100.9°F (2022) | 45.0°F (1999) | 0.40 in (2023) |
| September 5 | 102.0°F (2022) | 46.0°F (2004) | 0.03 in (2001) |
| September 6 | 104.0°F (2022) | 41.0°F (2010) | 0.36 in (2002) |
| September 7 | 104.0°F (2022) | 43.0°F (2001) | 0.30 in (2002) |
| September 8 | 96.1°F (2022) | 39.9°F (2001) | 0.46 in (1950) |
| September 9 | 96.1°F (2021) | 42.1°F (2001) | 0.35 in (2003) |
| September 10 | 96.1°F (2021) | 45.0°F (2010) | 0.14 in (1998) |
| September 11 | 93.0°F (2024) | 43.0°F (2010) | 0.21 in (2019) |
| September 12 | 93.0°F (2022) | 37.9°F (1951) | 0.15 in (2005) |
| September 13 | 91.9°F (1948) | 42.1°F (1951) | 0.67 in (2022) |
| September 14 | 96.1°F (1948) | 44.1°F (2003) | 0.83 in (2006) |
| September 15 | 91.9°F (1948) | 39.0°F (1950) | 1.24 in (2017) |
| September 16 | 91.9°F (2000) | 35.1°F (2006) | 0.99 in (2015) |
| September 17 | 91.9°F (2014) | 37.9°F (2006) | 0.40 in (2011) |
| September 18 | 90.0°F (2014) | 37.0°F (2003) | 0.52 in (2002) |
| September 19 | 91.9°F (2010) | 41.0°F (2003) | 0.27 in (1999) |
| September 20 | 89.1°F (2022) | 42.1°F (2004) | 0.70 in (2019) |
| September 21 | 86.0°F (2013) | 37.0°F (1951) | 0.41 in (2023) |
| September 22 | 88.0°F (2020) | 37.9°F (1951) | 1.12 in (2016) |
| September 23 | 89.1°F (2001) | 34.0°F (2000) | 1.03 in (2016) |
| September 24 | 90.0°F (2001) | 37.9°F (2000) | 0.28 in (2016) |
| September 25 | 100.0°F (2000) | 37.9°F (2000) | 0.13 in (1998) |
| September 26 | 126.0°F (2000) | 7.0°F (2000) | 0.11 in (1998) |
| September 27 | 89.1°F (2001) | 33.1°F (1999) | 1.30 in (2014) |
| September 28 | 93.9°F (2024) | 32.0°F (1999) | 0.60 in (1949) |
| September 29 | 96.1°F (2024) | 34.0°F (1950) | 0.45 in (1950) |
| September 30 | 87.1°F (2011) | 32.0°F (2019) | 0.57 in (2009) |