September weather in Arvada, CO
The average temperature in Arvada in September is 63.7°F (51.1°F–76.3°F). Average precipitation: 1.79 inches. Average snowfall is 0.4 inches.
September is a fall month in Arvada, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 25.2°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
76.3°F
Avg Low
51.1°F
Precipitation
1.79 in
Snow
0.4 in
September records in Arvada
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2011) | 48.0°F (2005) | 0.48 in (1999) |
| September 2 | 97.0°F (2023) | 45.0°F (2006) | 0.61 in (1990) |
| September 3 | 98.1°F (2019) | 43.0°F (2006) | 0.29 in (1999) |
| September 4 | 93.9°F (2013) | 45.0°F (2006) | 0.23 in (1999) |
| September 5 | 93.9°F (2022) | 46.0°F (2004) | 1.46 in (2018) |
| September 6 | 97.0°F (2020) | 44.1°F (2008) | 0.92 in (1990) |
| September 7 | 97.0°F (2022) | 43.0°F (2001) | 0.52 in (1990) |
| September 8 | 96.1°F (2022) | 33.1°F (2020) | 0.68 in (2001) |
| September 9 | 96.1°F (2022) | 28.9°F (2020) | 0.82 in (1989) |
| September 10 | 93.0°F (2021) | 30.9°F (2020) | 1.05 in (2013) |
| September 11 | 95.0°F (2021) | 37.0°F (2020) | 1.32 in (2013) |
| September 12 | 93.0°F (2021) | 30.9°F (2014) | 1.50 in (2013) |
| September 13 | 90.0°F (2024) | 32.0°F (2014) | 10.50 in (2013) |
| September 14 | 90.0°F (2018) | 37.0°F (2003) | 0.96 in (1982) |
| September 15 | 88.0°F (2018) | 39.0°F (2003) | 1.33 in (2011) |
| September 16 | 88.0°F (2000) | 41.0°F (1999) | 1.25 in (2013) |
| September 17 | 91.0°F (2000) | 39.9°F (2006) | 0.21 in (1987) |
| September 18 | 88.0°F (2000) | 35.1°F (2003) | 0.50 in (1996) |
| September 19 | 89.1°F (1998) | 36.0°F (1978) | 1.10 in (1996) |
| September 20 | 89.1°F (2022) | 32.0°F (1978) | 0.75 in (2000) |
| September 21 | 91.0°F (2010) | 30.9°F (1978) | 0.88 in (1995) |
| September 22 | 86.0°F (2015) | 36.0°F (1978) | 1.16 in (2024) |
| September 23 | 84.9°F (2007) | 30.9°F (2000) | 0.63 in (2025) |
| September 24 | 84.9°F (2007) | 28.9°F (2000) | 0.90 in (2017) |
| September 25 | 86.0°F (2020) | 28.9°F (2000) | 0.67 in (2007) |
| September 26 | 86.0°F (2014) | 34.0°F (2000) | 0.42 in (1996) |
| September 27 | 89.1°F (2024) | 37.0°F (1999) | 0.24 in (1996) |
| September 28 | 87.1°F (2015) | 33.1°F (1999) | 0.34 in (1984) |
| September 29 | 87.1°F (2024) | 28.0°F (1999) | 0.55 in (1985) |
| September 30 | 86.0°F (2019) | 28.0°F (1999) | 0.65 in (2014) |