Boulder Weather in October
Average highs run from 72°F on October 1 to 60°F on October 31, and lows from 42°F to 33°F. Normal precipitation for the month is 1.62 in over about 7 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 66°F
- Average low
- 37°F
- Precipitation
- 1.62 in
- Snowfall
- 7.0 in
- Record high
- 90°FOct 1, 1953
- Record low
- -2°FOct 29, 1917
- Chance of a freeze
- 99%
- Daylight
- 11 h 45 min to 10 h 31 min
- Cloud cover
- 55%
- Humidity
- 56%
- Dew point
- 22°F
- Wind
- 7.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Oct 1 | 72°F | 42°F | 90°F 1953 | 23°F 1985 | 24% | 3% |
| Oct 2 | 72°F | 42°F | 89°F 2005 | 27°F 1959 | 24% | 3% |
| Oct 3 | 71°F | 42°F | 88°F 1967 | 30°F 1927 | 23% | 3% |
| Oct 4 | 71°F | 41°F | 88°F 1922 | 30°F 1950 | 23% | 4% |
| Oct 5 | 70°F | 41°F | 90°F 1947 | 27°F 1991 | 23% | 4% |
| Oct 6 | 70°F | 41°F | 86°F 2020 | 28°F 1995 | 23% | 4% |
| Oct 7 | 69°F | 40°F | 88°F 1956 | 23°F 1970 | 23% | 4% |
| Oct 8 | 69°F | 40°F | 86°F 1979 | 22°F 1970 | 23% | 5% |
| Oct 9 | 69°F | 39°F | 86°F 1910 | 24°F 1990 | 23% | 5% |
| Oct 10 | 68°F | 39°F | 88°F 1910 | 15°F 2009 | 23% | 5% |
| Oct 11 | 68°F | 39°F | 87°F 1996 | 15°F 2019 | 23% | 5% |
| Oct 12 | 67°F | 38°F | 89°F 1950 | 20°F 1969 | 23% | 6% |
| Oct 13 | 67°F | 38°F | 86°F 1948 | 10°F 1969 | 22% | 6% |
| Oct 14 | 67°F | 38°F | 85°F 1950 | 13°F 1969 | 22% | 6% |
| Oct 15 | 66°F | 37°F | 85°F 1958 | 13°F 2018 | 22% | 6% |
| Oct 16 | 66°F | 37°F | 87°F 1991 | 20°F 1969 | 22% | 7% |
| Oct 17 | 65°F | 37°F | 85°F 2003 | 15°F 1999 | 22% | 7% |
| Oct 18 | 65°F | 36°F | 86°F 1926 | 19°F 1925 | 22% | 7% |
| Oct 19 | 65°F | 36°F | 87°F 2003 | 17°F 1916 | 22% | 8% |
| Oct 20 | 64°F | 36°F | 87°F 1950 | 19°F 1916 | 22% | 8% |
| Oct 21 | 64°F | 36°F | 84°F 1950 | 17°F 1911 | 22% | 9% |
| Oct 22 | 64°F | 35°F | 85°F 2003 | 19°F 1906 | 22% | 9% |
| Oct 23 | 63°F | 35°F | 86°F 2003 | 21°F 2008 | 22% | 9% |
| Oct 24 | 63°F | 35°F | 83°F 2014 | 19°F 1975 | 22% | 10% |
| Oct 25 | 62°F | 34°F | 85°F 2017 | 10°F 2020 | 22% | 10% |
| Oct 26 | 62°F | 34°F | 81°F 1966 | 5°F 2020 | 22% | 11% |
| Oct 27 | 62°F | 34°F | 82°F 2016 | 4°F 2020 | 22% | 11% |
| Oct 28 | 61°F | 34°F | 81°F 2024 | 11°F 1925 | 22% | 11% |
| Oct 29 | 61°F | 33°F | 83°F 1950 | -2°F 1917 | 22% | 12% |
| Oct 30 | 61°F | 33°F | 80°F 1933 | 3°F 2019 | 22% | 12% |
| Oct 31 | 60°F | 33°F | 83°F 1950 | 3°F 2019 | 22% | 12% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- October 1
- sunrise 6:58 AM, sunset 6:43 PM
- October 31
- sunrise 7:29 AM, sunset 6:00 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00050848 (Boulder), public domain. Records: NOAA GHCN-Daily, station USC00050848, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.