September weather in Dillon, CO
The average temperature in Dillon in September is 47.9°F (29.7°F–66.2°F). Average precipitation: 1.40 inches. Average snowfall is 1.1 inches.
September is a fall month in Dillon, and is warmer than the annual average of 35.5°F. Daily temperatures swing about 36.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 15m. For travel, September is cool.
Avg High
66.2°F
Avg Low
29.7°F
Precipitation
1.40 in
Snow
1.1 in
September records in Dillon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.9°F (1915) | 21.0°F (1920) | 0.35 in (1984) |
| September 2 | 82.0°F (1953) | 18.0°F (1959) | 1.02 in (1994) |
| September 3 | 81.0°F (2019) | 19.0°F (1934) | 0.80 in (1910) |
| September 4 | 84.0°F (1960) | 21.9°F (1928) | 1.04 in (1930) |
| September 5 | 82.9°F (1960) | 21.9°F (1953) | 1.00 in (1930) |
| September 6 | 82.9°F (1978) | 19.0°F (1943) | 0.65 in (1925) |
| September 7 | 84.0°F (1959) | 19.9°F (1956) | 2.00 in (1930) |
| September 8 | 82.0°F (2022) | 17.1°F (1948) | 0.87 in (1941) |
| September 9 | 80.1°F (2013) | 14.0°F (1941) | 0.80 in (2006) |
| September 10 | 80.1°F (2021) | 15.1°F (1932) | 0.58 in (1940) |
| September 11 | 80.1°F (2021) | 16.0°F (1944) | 0.82 in (1980) |
| September 12 | 79.0°F (1956) | 15.1°F (1947) | 0.98 in (2008) |
| September 13 | 79.0°F (1955) | 18.0°F (1945) | 0.96 in (2013) |
| September 14 | 79.0°F (1990) | 15.1°F (1924) | 0.39 in (1919) |
| September 15 | 84.0°F (1954) | 15.1°F (1947) | 0.37 in (1966) |
| September 16 | 78.1°F (2018) | 14.0°F (1944) | 0.96 in (1945) |
| September 17 | 78.1°F (1935) | 12.0°F (1958) | 0.62 in (1975) |
| September 18 | 78.1°F (1956) | 15.1°F (1971) | 0.80 in (1931) |
| September 19 | 79.0°F (1939) | 9.0°F (1924) | 0.70 in (1931) |
| September 20 | 80.1°F (2010) | 10.9°F (1942) | 0.89 in (1928) |
| September 21 | 77.0°F (1953) | 3.9°F (1924) | 0.76 in (1995) |
| September 22 | 79.0°F (1922) | 10.9°F (1957) | 1.04 in (1930) |
| September 23 | 78.1°F (1954) | 10.0°F (1946) | 0.88 in (2013) |
| September 24 | 75.0°F (1948) | 14.0°F (1956) | 0.80 in (1931) |
| September 25 | 77.0°F (1953) | 10.0°F (1926) | 0.64 in (1915) |
| September 26 | 79.0°F (2024) | 8.1°F (1934) | 0.62 in (1959) |
| September 27 | 77.0°F (1953) | 12.0°F (1996) | 0.58 in (1959) |
| September 28 | 75.9°F (1951) | 10.9°F (1916) | 0.88 in (2005) |
| September 29 | 81.0°F (1942) | 12.9°F (1999) | 1.21 in (1959) |
| September 30 | 78.1°F (2010) | 7.0°F (1959) | 0.88 in (1945) |