September weather in Cortez, CO
The average temperature in Cortez in September is 63.8°F (47.5°F–80.1°F). Average precipitation: 1.48 inches.
September is a fall month in Cortez, and is warmer than the annual average of 50.8°F. Daily temperatures swing about 32.6°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.1°F
Avg Low
47.5°F
Precipitation
1.48 in
Daylight
12h 14m
September records in Cortez
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (1948) | 37.0°F (1932) | 0.80 in (1966) |
| September 2 | 97.0°F (2019) | 37.0°F (1932) | 0.59 in (2021) |
| September 3 | 99.0°F (2022) | 35.1°F (1973) | 0.66 in (1954) |
| September 4 | 97.0°F (2019) | 33.1°F (1961) | 0.44 in (2007) |
| September 5 | 96.1°F (2020) | 36.0°F (1932) | 0.53 in (2004) |
| September 6 | 99.0°F (2022) | 39.0°F (1943) | 0.94 in (1970) |
| September 7 | 96.1°F (2020) | 37.0°F (1936) | 0.73 in (1991) |
| September 8 | 93.9°F (2022) | 35.1°F (1913) | 0.59 in (2002) |
| September 9 | 93.9°F (2022) | 27.0°F (1941) | 0.91 in (1995) |
| September 10 | 95.0°F (2022) | 32.0°F (1962) | 2.56 in (2003) |
| September 11 | 93.0°F (2021) | 34.0°F (1932) | 0.99 in (2002) |
| September 12 | 91.0°F (1937) | 32.0°F (1978) | 1.19 in (1954) |
| September 13 | 90.0°F (2015) | 32.0°F (1952) | 1.08 in (2023) |
| September 14 | 90.0°F (1990) | 24.1°F (1914) | 0.53 in (1982) |
| September 15 | 91.0°F (2000) | 32.0°F (1985) | 1.00 in (1996) |
| September 16 | 90.0°F (2018) | 32.0°F (1991) | 0.92 in (1959) |
| September 17 | 91.9°F (2000) | 30.0°F (1945) | 0.41 in (1940) |
| September 18 | 91.0°F (2000) | 24.1°F (1971) | 0.81 in (1961) |
| September 19 | 91.0°F (1935) | 24.1°F (1971) | 1.02 in (1992) |
| September 20 | 89.1°F (2010) | 26.1°F (1978) | 0.95 in (2004) |
| September 21 | 91.0°F (1937) | 26.1°F (1978) | 1.04 in (1933) |
| September 22 | 88.0°F (2020) | 28.0°F (1983) | 1.96 in (1941) |
| September 23 | 89.1°F (1944) | 28.0°F (1946) | 0.88 in (2010) |
| September 24 | 84.9°F (1944) | 27.0°F (1913) | 0.99 in (1986) |
| September 25 | 86.0°F (2014) | 27.0°F (1913) | 0.79 in (1935) |
| September 26 | 88.0°F (2014) | 23.0°F (1930) | 0.49 in (1948) |
| September 27 | 88.0°F (2015) | 25.0°F (1930) | 0.58 in (1943) |
| September 28 | 89.1°F (2024) | 27.0°F (1934) | 0.84 in (2014) |
| September 29 | 90.0°F (2024) | 27.0°F (1936) | 0.74 in (1937) |
| September 30 | 88.0°F (2015) | 26.1°F (1961) | 0.89 in (1937) |