September weather in Vail, CO
The average temperature in Vail in September is 50.3°F (34.0°F–66.6°F). Average precipitation: 1.96 inches. Average snowfall is 0.9 inches.
September is a fall month in Vail, and is warmer than the annual average of 37.9°F. Daily temperatures swing about 32.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is cool.
Avg High
66.6°F
Avg Low
34.0°F
Precipitation
1.96 in
Snow
0.9 in
September records in Vail
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.9°F (1991) | 28.9°F (1989) | 0.67 in (1992) |
| September 2 | 82.9°F (1987) | 30.9°F (2008) | 1.01 in (1994) |
| September 3 | 82.0°F (1989) | 27.0°F (1993) | 0.32 in (1985) |
| September 4 | 84.9°F (1990) | 28.0°F (1989) | 0.68 in (2016) |
| September 5 | 82.0°F (1990) | 28.0°F (2021) | 0.55 in (2004) |
| September 6 | 82.0°F (1998) | 28.0°F (1987) | 1.20 in (1990) |
| September 7 | 82.0°F (1986) | 27.0°F (1987) | 0.75 in (2001) |
| September 8 | 82.0°F (1988) | 26.1°F (1987) | 0.30 in (2015) |
| September 9 | 81.0°F (1988) | 23.0°F (2001) | 0.63 in (2006) |
| September 10 | 84.0°F (1988) | 25.0°F (2001) | 1.16 in (2014) |
| September 11 | 82.0°F (1988) | 26.1°F (1987) | 0.88 in (2003) |
| September 12 | 80.1°F (1990) | 23.0°F (1985) | 1.10 in (2008) |
| September 13 | 82.9°F (1990) | 24.1°F (1987) | 0.68 in (2013) |
| September 14 | 84.9°F (1990) | 23.0°F (1989) | 0.48 in (1993) |
| September 15 | 81.0°F (1990) | 23.0°F (1987) | 0.76 in (1996) |
| September 16 | 86.0°F (1990) | 21.0°F (2008) | 0.59 in (2009) |
| September 17 | 79.0°F (2000) | 24.1°F (2006) | 1.15 in (2007) |
| September 18 | 79.0°F (1989) | 21.0°F (1987) | 0.55 in (2002) |
| September 19 | 78.1°F (2018) | 18.0°F (1988) | 0.38 in (1996) |
| September 20 | 77.0°F (2010) | 23.0°F (1988) | 0.56 in (1999) |
| September 21 | 75.9°F (1988) | 23.0°F (1987) | 0.84 in (2006) |
| September 22 | 73.0°F (1988) | 19.0°F (1985) | 1.07 in (2000) |
| September 23 | 75.0°F (1987) | 21.9°F (1991) | 0.50 in (2025) |
| September 24 | 73.0°F (2001) | 24.1°F (1985) | 0.46 in (2025) |
| September 25 | 80.1°F (1987) | 17.1°F (1985) | 0.29 in (1986) |
| September 26 | 78.1°F (1987) | 21.0°F (2000) | 0.55 in (2002) |
| September 27 | 79.0°F (1989) | 18.0°F (1996) | 0.31 in (2013) |
| September 28 | 79.0°F (1989) | 21.9°F (1987) | 1.80 in (2005) |
| September 29 | 84.0°F (1989) | 15.1°F (1985) | 0.79 in (1995) |
| September 30 | 79.0°F (1989) | 14.0°F (1985) | 0.78 in (1995) |