Weather on October 20
Boulder, CO
55 Years of Data
Avg High
66°F
Avg Low
37°F
Warmest
2023
67°F avg
Coldest
1984
32°F avg
About This Date
October 20th in Boulder, CO typically brings mild fall weather, with average highs around 66°F and lows near 37°F — a 29°F daily swing. Over 55 years of records, the warmest October 20th was in 2023 (67°F average), while the coldest was 1984 (32°F) — a 35°F range across recorded history. Precipitation has occurred on 13% of recorded October 20th dates, with snow falling 4% of the time (heaviest snowfall: 1.9"). The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Boulder, CO? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 41° | 55° | — | — |
| 2024 | 72° | 41° | 56° | — | — |
| 2023warmest | 86° | 48° | 67° | — | — |
| 2022 | 81° | 41° | 61° | — | — |
| 2021 | 61° | 32° | 46° | — | — |
| 2020 | 68° | 36° | 52° | — | — |
| 2019 | 54° | 37° | 45° | — | — |
| 2018 | 70° | 37° | 53° | — | — |
| 2017 | 78° | 46° | 62° | — | — |
| 2016 | 61° | 26° | 43° | — | — |
| 2015 | 74° | 46° | 60° | — | — |
| 2014 | 76° | 41° | 58° | — | — |
| 2013 | 57° | 33° | 45° | 0.69" | 0.1" |
| 2012 | 79° | 51° | 65° | — | — |
| 2011 | 73° | 35° | 54° | — | — |
| 2010 | 72° | 38° | 55° | — | — |
| 2009 | 62° | 37° | 50° | — | — |
| 2008 | 64° | 46° | 55° | — | — |
| 2007 | 77° | 54° | 65° | — | — |
| 2006 | 62° | 38° | 50° | 0.05" | — |
| 2005 | 70° | 38° | 54° | 0.03" | — |
| 2004 | 70° | 40° | 55° | — | — |
| 2003 | 78° | 50° | 64° | — | — |
| 2002 | 70° | 36° | 53° | — | — |
| 2001 | 66° | 45° | 55° | — | — |
| 2000 | 64° | 36° | 50° | — | — |
| 1999 | 65° | 30° | 47° | — | — |
| 1998 | 49° | 35° | 42° | — | — |
| 1997 | 51° | 39° | 45° | — | — |
| 1996 | 65° | 36° | 50° | 0.05" | — |
| 1995 | 66° | 28° | 47° | — | — |
| 1994 | 64° | 34° | 49° | — | — |
| 1993 | 50° | 36° | 43° | — | — |
| 1992 | 77° | 38° | 57° | — | — |
| 1991 | 61° | 32° | 46° | — | — |
| 1990 | 55° | 30° | 43° | 1.07" | 1.9" |
| 1989 | 60° | 25° | 42° | — | — |
| 1988 | 69° | 36° | 52° | — | — |
| 1987 | 54° | 28° | 41° | — | — |
| 1986 | 58° | 40° | 49° | 0.53" | — |
| 1985 | 72° | 33° | 52° | — | — |
| 1984coldest | 36° | 29° | 32° | 0.03" | — |
| 1983 | 60° | 30° | 45° | — | — |
| 1982 | 56° | 27° | 41° | — | — |
| 1981 | 72° | 48° | 60° | — | — |
| 1980 | 68° | 36° | 52° | — | — |
| 1979 | 68° | 42° | 55° | — | — |
| 1978 | 77° | 42° | 60° | — | — |
| 1977 | 78° | 45° | 61° | — | — |
| 1976 | 55° | 27° | 41° | — | — |
| 1975 | 78° | 42° | 60° | — | — |
| 1974 | 72° | 43° | 57° | — | — |
| 1973 | 77° | 39° | 58° | — | — |
| 1972 | 65° | 32° | 48° | — | — |
| 1971 | 63° | 31° | 47° | — | — |
55 years of data from BOULDER MUNI AP