Weather on October 21
Arvada, CO
55 Years of Data
Avg High
62°F
Avg Low
35°F
Warmest
1992
69°F avg
Coldest
2007
22°F avg
About This Date
October 21st in Arvada, CO typically brings mild fall weather, with average highs around 62°F and lows near 35°F — a 27°F daily swing. Over 55 years of records, the warmest October 21st was in 1992 (69°F average), while the coldest was 2007 (22°F) — a 47°F range across recorded history. Precipitation has occurred on 18% of recorded October 21st dates, with snow falling 2% of the time (heaviest snowfall: 2"). The last decade has been 6.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.4°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Arvada, CO? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 28° | 47° | — | — |
| 2024 | 75° | 45° | 60° | 0.23" | — |
| 2023 | 85° | 50° | 67° | — | — |
| 2022 | 79° | 46° | 62° | — | — |
| 2021 | 66° | 22° | 44° | — | — |
| 2020 | 69° | 32° | 51° | — | — |
| 2019 | 51° | 27° | 39° | — | — |
| 2018 | 70° | 42° | 56° | — | — |
| 2017 | 78° | 43° | 60° | — | — |
| 2016 | 61° | 31° | 46° | — | — |
| 2015 | 71° | 46° | 59° | 2.13" | — |
| 2014 | 78° | 50° | 64° | — | — |
| 2013 | 49° | 33° | 41° | 0.43" | — |
| 2012 | 80° | 48° | 64° | — | — |
| 2011 | 61° | 37° | 49° | — | — |
| 2010 | 63° | 38° | 50° | — | — |
| 2009 | 29° | 25° | 27° | — | — |
| 2008 | 57° | 23° | 40° | — | — |
| 2007coldest | 29° | 16° | 22° | — | — |
| 2006 | 37° | 20° | 28° | — | — |
| 2005 | 41° | 34° | 37° | — | — |
| 2004 | 63° | 42° | 52° | — | — |
| 2003 | 75° | 46° | 61° | — | — |
| 2002 | 56° | 32° | 44° | — | — |
| 2001 | 71° | 31° | 51° | — | — |
| 2000 | 67° | 41° | 54° | — | — |
| 1999 | 69° | 41° | 55° | — | — |
| 1998 | 47° | 35° | 41° | — | — |
| 1997 | 50° | 30° | 40° | 0.08" | — |
| 1996 | 42° | 25° | 33° | 0.38" | 2" |
| 1995 | 73° | 30° | 52° | — | — |
| 1994 | 66° | 35° | 51° | — | — |
| 1993 | 52° | 30° | 41° | — | — |
| 1992warmest | 82° | 56° | 69° | — | — |
| 1991 | 76° | 40° | 58° | — | — |
| 1990 | 38° | 22° | 30° | — | — |
| 1989 | 75° | 38° | 56° | — | — |
| 1988 | 72° | 31° | 51° | — | — |
| 1987 | 53° | 20° | 36° | — | — |
| 1986 | 61° | 36° | 48° | — | — |
| 1985 | 71° | 41° | 56° | — | — |
| 1984 | 37° | 25° | 31° | 0.03" | — |
| 1983 | 61° | 35° | 48° | — | — |
| 1982 | 56° | 25° | 40° | — | — |
| 1981 | 76° | 32° | 54° | 0.15" | — |
| 1980 | 67° | 37° | 52° | — | — |
| 1979 | 36° | 28° | 32° | 0.58" | — |
| 1978 | 66° | 34° | 50° | 2.9" | — |
| 1977 | 62° | 39° | 51° | 0.58" | — |
| 1976 | 64° | 28° | 46° | — | — |
| 1975 | 81° | 43° | 62° | — | — |
| 1974 | 77° | 52° | 64° | — | — |
| 1973 | 78° | 41° | 60° | — | — |
| 1972 | 58° | 36° | 47° | — | — |
| 1971 | 62° | 32° | 47° | — | — |
55 years of data from WATERTON NORTH COLORADO