October weather in Boulder, CO
The average temperature in Boulder in October is 51.6°F (37.2°F–65.9°F). Average precipitation: 1.62 inches. Average snowfall is 7.0 inches.
October is a fall month in Boulder, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 28.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 10h 55m. For travel, October is cool.
Avg High
65.9°F
Avg Low
37.2°F
Precipitation
1.62 in
Snow
7.0 in
October records in Boulder
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 90.0°F (1953) | 23.0°F (1985) | 0.94 in (1893) |
| October 2 | 89.1°F (2005) | 27.0°F (1959) | 1.12 in (2017) |
| October 3 | 88.0°F (1967) | 30.0°F (1927) | 1.02 in (1969) |
| October 4 | 88.0°F (1922) | 30.0°F (1950) | 1.83 in (1984) |
| October 5 | 90.0°F (1947) | 27.0°F (1991) | 1.61 in (1951) |
| October 6 | 86.0°F (2020) | 28.0°F (1995) | 1.09 in (1962) |
| October 7 | 88.0°F (1956) | 23.0°F (1970) | 0.95 in (1921) |
| October 8 | 86.0°F (1979) | 21.9°F (1970) | 0.78 in (2018) |
| October 9 | 86.0°F (1910) | 24.1°F (1990) | 0.99 in (2014) |
| October 10 | 88.0°F (1910) | 15.1°F (2009) | 1.55 in (2005) |
| October 11 | 87.1°F (1996) | 15.1°F (2019) | 1.26 in (1986) |
| October 12 | 89.1°F (1950) | 19.9°F (1969) | 1.20 in (1974) |
| October 13 | 86.0°F (1948) | 10.0°F (1969) | 0.67 in (2004) |
| October 14 | 84.9°F (1950) | 12.9°F (1969) | 1.03 in (1925) |
| October 15 | 84.9°F (1958) | 12.9°F (2018) | 2.50 in (1916) |
| October 16 | 87.1°F (1991) | 19.9°F (1969) | 2.10 in (1942) |
| October 17 | 84.9°F (2003) | 15.1°F (1999) | 1.19 in (1942) |
| October 18 | 86.0°F (1926) | 19.0°F (1925) | 0.97 in (1960) |
| October 19 | 87.1°F (2003) | 17.1°F (1916) | 0.44 in (1911) |
| October 20 | 87.1°F (1950) | 19.0°F (1916) | 0.75 in (1936) |
| October 21 | 84.0°F (1950) | 17.1°F (1911) | 1.03 in (2015) |
| October 22 | 84.9°F (2003) | 19.0°F (1906) | 1.90 in (1978) |
| October 23 | 86.0°F (2003) | 21.0°F (2008) | 1.96 in (1914) |
| October 24 | 82.9°F (2014) | 19.0°F (1975) | 2.13 in (1923) |
| October 25 | 91.9°F (1901) | 10.0°F (2020) | 1.37 in (1997) |
| October 26 | 81.0°F (1966) | 5.0°F (2020) | 1.35 in (2011) |
| October 27 | 82.0°F (2016) | 3.9°F (2020) | 0.48 in (1920) |
| October 28 | 81.0°F (2024) | 10.9°F (1925) | 1.57 in (2009) |
| October 29 | 82.9°F (1950) | -2.0°F (1917) | 1.06 in (1929) |
| October 30 | 80.1°F (1933) | 3.0°F (2019) | 2.30 in (1903) |
| October 31 | 82.9°F (1950) | 3.0°F (2019) | 0.60 in (1920) |