September weather in Iliff, CO
The average temperature in Iliff in September is 65.1°F (49.0°F–81.3°F). Average precipitation: 1.63 inches.
September is a fall month in Iliff, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 32.3°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
81.3°F
Avg Low
49.0°F
Precipitation
1.63 in
Daylight
12h 15m
September records in Iliff
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1990) | 32.0°F (1956) | 1.94 in (1992) |
| September 2 | 100.0°F (1947) | 34.0°F (1952) | 0.73 in (1942) |
| September 3 | 100.0°F (1998) | 34.0°F (1974) | 0.67 in (1929) |
| September 4 | 100.0°F (1998) | 37.0°F (1964) | 0.75 in (1983) |
| September 5 | 102.0°F (1998) | 36.0°F (1921) | 1.42 in (1929) |
| September 6 | 100.0°F (1976) | 37.9°F (1910) | 0.61 in (1942) |
| September 7 | 99.0°F (1933) | 35.1°F (1929) | 1.10 in (1935) |
| September 8 | 99.0°F (1988) | 34.0°F (1929) | 1.05 in (1935) |
| September 9 | 99.0°F (1931) | 28.0°F (1962) | 1.55 in (1946) |
| September 10 | 102.9°F (1979) | 27.0°F (1962) | 0.98 in (1940) |
| September 11 | 98.1°F (1974) | 36.0°F (1913) | 1.91 in (1938) |
| September 12 | 97.0°F (1931) | 30.9°F (1913) | 0.76 in (1991) |
| September 13 | 98.1°F (1911) | 28.9°F (1949) | 0.63 in (1938) |
| September 14 | 102.0°F (1990) | 30.0°F (1993) | 0.60 in (1958) |
| September 15 | 95.0°F (1997) | 30.0°F (1934) | 0.87 in (1913) |
| September 16 | 96.1°F (1995) | 32.0°F (1951) | 0.54 in (1918) |
| September 17 | 99.0°F (2000) | 28.9°F (1965) | 0.73 in (1996) |
| September 18 | 95.0°F (1988) | 30.9°F (1965) | 0.91 in (1996) |
| September 19 | 95.0°F (1937) | 28.0°F (1971) | 1.25 in (1924) |
| September 20 | 95.0°F (1937) | 19.9°F (1913) | 0.63 in (1961) |
| September 21 | 91.9°F (1936) | 19.9°F (1913) | 1.01 in (1963) |
| September 22 | 97.0°F (2005) | 28.0°F (1913) | 1.05 in (1941) |
| September 23 | 93.0°F (1933) | 24.1°F (1913) | 1.43 in (2009) |
| September 24 | 95.0°F (1979) | 25.0°F (1913) | 0.86 in (1996) |
| September 25 | 93.0°F (1992) | 18.0°F (1913) | 0.67 in (1959) |
| September 26 | 95.0°F (2003) | 15.1°F (1913) | 0.92 in (1999) |
| September 27 | 93.9°F (2001) | 21.0°F (1964) | 0.70 in (1945) |
| September 28 | 93.9°F (1953) | 26.1°F (1913) | 0.70 in (1936) |
| September 29 | 91.9°F (1953) | 19.9°F (1985) | 0.35 in (1985) |
| September 30 | 93.0°F (1994) | 14.0°F (1985) | 1.24 in (1927) |