Weather on October 21
Denver, CO
55 Years of Data
Avg High
67°F
Avg Low
36°F
Warmest
1992
64°F avg
Coldest
1984
28°F avg
About This Date
October 21st in Denver, CO typically brings mild fall weather, with average highs around 67°F and lows near 36°F — a 31°F daily swing. Over 55 years of records, the warmest October 21st was in 1992 (64°F average), while the coldest was 1984 (28°F) — a 36°F range across recorded history. Precipitation has occurred on 22% of recorded October 21st dates, with snow falling 5% of the time (heaviest snowfall: 1.1"). The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Denver, CO? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 29° | 44° | — | — |
| 2024 | 74° | 39° | 56° | — | — |
| 2023 | 86° | 40° | 63° | — | — |
| 2022 | 81° | 43° | 62° | — | — |
| 2021 | 67° | 35° | 51° | — | — |
| 2020 | 69° | 36° | 52° | — | — |
| 2019 | 50° | 29° | 39° | — | — |
| 2018 | 70° | 34° | 52° | — | — |
| 2017 | 80° | 46° | 63° | — | — |
| 2016 | 64° | 30° | 47° | — | — |
| 2015 | 73° | 47° | 60° | 1.24" | — |
| 2014 | 77° | 42° | 60° | — | — |
| 2013 | 46° | 32° | 39° | 0.15" | — |
| 2012 | 77° | 46° | 62° | — | — |
| 2011 | 70° | 36° | 53° | — | — |
| 2010 | 73° | 35° | 54° | — | — |
| 2009 | 49° | 32° | 40° | 0.56" | 0.1" |
| 2008 | 63° | 41° | 52° | 0.23" | — |
| 2007 | 82° | 36° | 59° | 0.28" | — |
| 2006 | 64° | 23° | 44° | 0.74" | 1" |
| 2005 | 68° | 37° | 53° | — | — |
| 2004 | 74° | 36° | 55° | — | — |
| 2003 | 83° | 44° | 63° | — | — |
| 2002 | 71° | 31° | 51° | — | — |
| 2001 | 55° | 34° | 44° | — | — |
| 2000 | 70° | 36° | 53° | — | — |
| 1999 | 69° | 37° | 53° | — | — |
| 1998 | 61° | 31° | 46° | — | — |
| 1997 | 59° | 36° | 47° | — | — |
| 1996 | 44° | 24° | 34° | — | — |
| 1995 | 75° | 41° | 58° | — | — |
| 1994 | 68° | 40° | 54° | — | — |
| 1993 | 67° | 34° | 50° | — | — |
| 1992warmest | 81° | 47° | 64° | — | — |
| 1991 | 76° | 35° | 55° | — | — |
| 1990 | 54° | 25° | 39° | — | — |
| 1989 | 73° | 39° | 56° | — | — |
| 1988 | 73° | 36° | 54° | — | — |
| 1987 | 73° | 29° | 51° | — | — |
| 1986 | 55° | 40° | 47° | — | — |
| 1985 | 71° | 39° | 55° | — | — |
| 1984coldest | 29° | 27° | 28° | 0.25" | 1.1" |
| 1983 | 66° | 31° | 48° | — | — |
| 1982 | 61° | 31° | 46° | — | — |
| 1981 | 43° | 33° | 38° | 0.1" | — |
| 1980 | 69° | 36° | 52° | — | — |
| 1979 | 41° | 33° | 37° | 1.22" | — |
| 1978 | 66° | 44° | 55° | 0.91" | — |
| 1977 | 63° | 43° | 53° | 0.1" | — |
| 1976 | 68° | 25° | 46° | — | — |
| 1975 | 80° | 40° | 60° | — | — |
| 1974 | 77° | 40° | 58° | — | — |
| 1973 | 78° | 42° | 60° | — | — |
| 1972 | 58° | 41° | 49° | 0.18" | — |
| 1971 | 65° | 31° | 48° | — | — |
55 years of data from DENVER-STAPLETON