September weather in Burlington, CO
The average temperature in Burlington in September is 65.3°F (50.0°F–80.5°F). Average precipitation: 1.29 inches.
September is a fall month in Burlington, and is warmer than the annual average of 51.7°F. Daily temperatures swing about 30.5°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
80.5°F
Avg Low
50.0°F
Precipitation
1.29 in
Daylight
12h 15m
September records in Burlington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1960) | 37.0°F (1956) | 1.60 in (1962) |
| September 2 | 102.0°F (1960) | 41.0°F (2006) | 1.50 in (1938) |
| September 3 | 104.0°F (2023) | 37.9°F (1974) | 1.30 in (1919) |
| September 4 | 100.0°F (2023) | 37.9°F (1961) | 1.61 in (1940) |
| September 5 | 100.0°F (1959) | 37.9°F (1945) | 1.40 in (1938) |
| September 6 | 100.9°F (1959) | 32.0°F (1956) | 0.20 in (1923) |
| September 7 | 100.9°F (2022) | 34.0°F (1956) | 1.80 in (1963) |
| September 8 | 100.0°F (1977) | 34.0°F (1929) | 0.98 in (1935) |
| September 9 | 98.1°F (2022) | 30.0°F (2020) | 1.61 in (2009) |
| September 10 | 97.0°F (1974) | 30.0°F (2020) | 1.12 in (2025) |
| September 11 | 99.0°F (2021) | 32.0°F (1970) | 1.24 in (1924) |
| September 12 | 100.0°F (2021) | 33.1°F (2014) | 1.43 in (1973) |
| September 13 | 98.1°F (1955) | 33.1°F (1945) | 3.45 in (2013) |
| September 14 | 98.1°F (1918) | 32.0°F (1993) | 1.20 in (1976) |
| September 15 | 99.0°F (2015) | 32.0°F (1993) | 2.52 in (1917) |
| September 16 | 96.1°F (1955) | 30.0°F (1951) | 1.38 in (1958) |
| September 17 | 96.1°F (1954) | 34.0°F (1971) | 0.76 in (1906) |
| September 18 | 96.1°F (2004) | 32.0°F (1971) | 1.54 in (1924) |
| September 19 | 98.1°F (1920) | 33.1°F (2006) | 1.70 in (1965) |
| September 20 | 98.1°F (2022) | 27.0°F (1983) | 1.65 in (1963) |
| September 21 | 100.0°F (2022) | 25.0°F (1983) | 0.93 in (2006) |
| September 22 | 96.1°F (1906) | 28.0°F (1983) | 2.00 in (1941) |
| September 23 | 91.9°F (1947) | 24.1°F (1983) | 0.97 in (2015) |
| September 24 | 95.0°F (2003) | 27.0°F (1913) | 1.04 in (2025) |
| September 25 | 93.9°F (2020) | 25.0°F (1912) | 0.45 in (1955) |
| September 26 | 96.1°F (1998) | 21.0°F (1942) | 0.50 in (1917) |
| September 27 | 98.1°F (2021) | 23.0°F (1908) | 0.70 in (1935) |
| September 28 | 95.0°F (2005) | 27.0°F (1945) | 0.98 in (1965) |
| September 29 | 93.9°F (2023) | 23.0°F (1985) | 1.02 in (1911) |
| September 30 | 95.0°F (1994) | 19.9°F (1985) | 2.51 in (1904) |