September weather in Walden, CO
The average temperature in Walden in September is 47.9°F (29.4°F–66.4°F). Average precipitation: 1.34 inches. Average snowfall is 1.0 inches.
September is a fall month in Walden, and is warmer than the annual average of 35.3°F. Daily temperatures swing about 37°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is cool.
Avg High
66.4°F
Avg Low
29.4°F
Precipitation
1.34 in
Snow
1.0 in
September records in Walden
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 84.9°F (1983) | 18.0°F (1956) | 0.90 in (1988) |
| September 2 | 82.9°F (1897) | 19.0°F (1952) | 0.34 in (1991) |
| September 3 | 87.1°F (1998) | 17.1°F (1974) | 0.60 in (1938) |
| September 4 | 89.1°F (1998) | 19.9°F (1953) | 0.53 in (2004) |
| September 5 | 88.0°F (1978) | 19.0°F (1953) | 0.61 in (1965) |
| September 6 | 88.0°F (1978) | 18.0°F (1956) | 0.41 in (2007) |
| September 7 | 87.1°F (1998) | 15.1°F (2010) | 0.36 in (2019) |
| September 8 | 84.0°F (2022) | 19.9°F (1948) | 0.53 in (1989) |
| September 9 | 82.9°F (1958) | 9.0°F (1962) | 0.43 in (1947) |
| September 10 | 82.9°F (2021) | 12.9°F (2016) | 1.00 in (1947) |
| September 11 | 82.9°F (2021) | 16.0°F (1898) | 0.65 in (1949) |
| September 12 | 82.9°F (1990) | 16.0°F (1898) | 0.85 in (2013) |
| September 13 | 84.9°F (1990) | 17.1°F (1945) | 0.63 in (1993) |
| September 14 | 84.0°F (1990) | 16.0°F (1961) | 0.43 in (2025) |
| September 15 | 87.1°F (1990) | 16.0°F (1971) | 0.33 in (1966) |
| September 16 | 86.0°F (2000) | 10.0°F (1951) | 0.69 in (2006) |
| September 17 | 80.1°F (1979) | 15.1°F (1901) | 1.03 in (2007) |
| September 18 | 81.0°F (1898) | 10.0°F (1971) | 0.44 in (1997) |
| September 19 | 82.0°F (1898) | 0.0°F (1942) | 1.47 in (1997) |
| September 20 | 80.1°F (1898) | 12.0°F (1978) | 1.36 in (1997) |
| September 21 | 79.0°F (1944) | 10.9°F (1975) | 0.98 in (2004) |
| September 22 | 81.0°F (1898) | 9.0°F (1957) | 0.97 in (2000) |
| September 23 | 81.0°F (1898) | 8.1°F (1956) | 0.36 in (2014) |
| September 24 | 81.0°F (1898) | 14.0°F (1975) | 0.43 in (2025) |
| September 25 | 82.0°F (1898) | 12.9°F (1958) | 0.43 in (1996) |
| September 26 | 81.0°F (1898) | 12.0°F (1942) | 0.53 in (1966) |
| September 27 | 82.0°F (1898) | 8.1°F (1996) | 0.27 in (1959) |
| September 28 | 81.0°F (1898) | 10.0°F (2020) | 0.38 in (1985) |
| September 29 | 84.9°F (1898) | 8.1°F (1984) | 0.88 in (2021) |
| September 30 | 87.1°F (1898) | 5.0°F (1959) | 0.91 in (2004) |