September weather in Brookside, CO
The average temperature in Brookside in September is 64.2°F (48.4°F–80.1°F). Average precipitation: 1.20 inches. Average snowfall is 0.2 inches.
September is a fall month in Brookside, and is warmer than the annual average of 52.1°F. Daily temperatures swing about 31.7°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
48.4°F
Precipitation
1.20 in
Snow
0.2 in
September records in Brookside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1948) | 41.0°F (1910) | 0.84 in (1942) |
| September 2 | 98.1°F (1947) | 42.1°F (1904) | 1.90 in (1930) |
| September 3 | 100.0°F (1971) | 36.0°F (1961) | 1.38 in (1961) |
| September 4 | 99.0°F (1899) | 37.0°F (1961) | 0.80 in (1909) |
| September 5 | 100.0°F (1899) | 37.0°F (1961) | 1.25 in (1909) |
| September 6 | 99.0°F (1899) | 39.0°F (1943) | 0.74 in (2024) |
| September 7 | 97.0°F (2020) | 39.0°F (1898) | 1.15 in (1996) |
| September 8 | 93.9°F (1931) | 37.9°F (1941) | 1.50 in (1960) |
| September 9 | 93.9°F (1931) | 30.0°F (2020) | 1.25 in (1980) |
| September 10 | 96.1°F (2021) | 30.0°F (2020) | 0.56 in (1940) |
| September 11 | 97.0°F (2021) | 35.1°F (2020) | 1.03 in (2023) |
| September 12 | 97.0°F (2021) | 32.0°F (1902) | 3.40 in (2013) |
| September 13 | 93.9°F (1895) | 34.0°F (1898) | 1.04 in (2012) |
| September 14 | 93.9°F (1990) | 32.0°F (1993) | 0.60 in (1979) |
| September 15 | 93.9°F (1895) | 33.1°F (1912) | 1.11 in (2011) |
| September 16 | 95.0°F (1895) | 32.0°F (1903) | 0.81 in (2013) |
| September 17 | 93.0°F (2018) | 28.9°F (1965) | 0.68 in (1971) |
| September 18 | 93.9°F (2018) | 30.9°F (1971) | 1.44 in (1923) |
| September 19 | 95.0°F (2018) | 30.0°F (1971) | 0.37 in (1990) |
| September 20 | 91.0°F (1956) | 28.9°F (1971) | 0.93 in (1965) |
| September 21 | 91.0°F (2005) | 28.0°F (1978) | 0.95 in (1971) |
| September 22 | 91.9°F (1980) | 28.0°F (1978) | 0.80 in (1970) |
| September 23 | 90.0°F (1898) | 28.0°F (1895) | 0.42 in (1941) |
| September 24 | 89.1°F (1966) | 30.0°F (1894) | 0.64 in (1940) |
| September 25 | 93.9°F (1898) | 26.1°F (1926) | 0.88 in (1927) |
| September 26 | 93.0°F (1898) | 28.9°F (1920) | 0.53 in (1927) |
| September 27 | 93.0°F (1899) | 25.0°F (1908) | 0.86 in (1935) |
| September 28 | 90.0°F (2001) | 26.1°F (1945) | 1.56 in (1974) |
| September 29 | 91.9°F (1998) | 25.0°F (1985) | 1.65 in (1959) |
| September 30 | 90.0°F (1899) | 26.1°F (1985) | 0.90 in (1959) |