September weather in Riverside, WY
The average temperature in Riverside in September is °F (°F–°F). Average precipitation: 2.42 inches.
September is a fall month in Riverside, and is cooler than the annual average of 0°F. Expect about 9 days with precipitation. Daylight averages about 12h 16m.
Avg High
°F
Avg Low
°F
Precipitation
2.42 in
Daylight
12h 16m
September records in Riverside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 80.1°F (1995) | 28.8°F (2008) | 1.90 in (2005) |
| September 2 | 81.7°F (2019) | 26.2°F (2008) | 0.40 in (1985) |
| September 3 | 79.2°F (1998) | 29.8°F (2010) | 0.60 in (2016) |
| September 4 | 81.7°F (1998) | 28.0°F (2008) | 0.60 in (1983) |
| September 5 | 82.4°F (2020) | 29.3°F (2008) | 0.80 in (1995) |
| September 6 | 80.1°F (2020) | 28.0°F (2001) | 0.60 in (2011) |
| September 7 | 80.1°F (2022) | 26.4°F (2001) | 0.70 in (1991) |
| September 8 | 77.0°F (2005) | 18.3°F (2020) | 0.90 in (2020) |
| September 9 | 78.4°F (2021) | 17.8°F (2020) | 0.60 in (1986) |
| September 10 | 79.7°F (2021) | 23.5°F (2020) | 0.50 in (1982) |
| September 11 | 75.9°F (1990) | 23.9°F (1989) | 1.10 in (1984) |
| September 12 | 79.5°F (1990) | 20.8°F (2014) | 0.40 in (1988) |
| September 13 | 77.7°F (1990) | 18.9°F (1993) | 0.80 in (1982) |
| September 14 | 79.2°F (1990) | 18.9°F (1993) | 0.50 in (1991) |
| September 15 | 78.8°F (1990) | 24.1°F (2004) | 1.40 in (2006) |
| September 16 | 78.8°F (2000) | 23.5°F (2006) | 0.90 in (2006) |
| September 17 | 73.0°F (2010) | 22.3°F (2003) | 0.50 in (2015) |
| September 18 | 73.6°F (2014) | 17.2°F (2003) | 1.00 in (1997) |
| September 19 | 76.3°F (2010) | 20.5°F (1988) | 1.30 in (1997) |
| September 20 | 72.7°F (2016) | 19.8°F (1995) | 0.90 in (2004) |
| September 21 | 69.3°F (2001) | 14.9°F (1995) | 1.10 in (2000) |
| September 22 | 71.2°F (2012) | 15.1°F (1995) | 1.00 in (2000) |
| September 23 | 70.5°F (2001) | 19.9°F (2000) | 0.90 in (2007) |
| September 24 | 74.3°F (2001) | 17.2°F (2000) | 0.60 in (1992) |
| September 25 | 76.1°F (2001) | 18.7°F (2000) | 0.80 in (1984) |
| September 26 | 76.8°F (2010) | 15.3°F (1996) | 0.60 in (1986) |
| September 27 | 75.6°F (2001) | 8.6°F (1996) | 0.60 in (1986) |
| September 28 | 76.6°F (2010) | 13.6°F (1999) | 0.90 in (1982) |
| September 29 | 74.3°F (1989) | 17.8°F (1988) | 0.50 in (1995) |
| September 30 | 72.3°F (2010) | 20.3°F (2009) | 1.00 in (2009) |