Weather on April 21
Denver, CO
55 Years of Data
Avg High
59°F
Avg Low
36°F
Warmest
1989
64°F avg
Coldest
1982
24°F avg
About This Date
April 21st in Denver, CO typically brings cool spring weather, with average highs around 59°F and lows near 36°F. Over 55 years of records, the warmest April 21st was in 1989 (64°F average), while the coldest was 1982 (24°F) — a 40°F range across recorded history. Precipitation has occurred on 24% of recorded April 21st dates, with snow falling 5% of the time (heaviest snowfall: 10"). The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Denver, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 25° | 48° | — | — |
| 2024 | 34° | 29° | 31° | 0.15" | 0.4" |
| 2023 | 47° | 30° | 38° | — | — |
| 2022 | 70° | 42° | 56° | — | — |
| 2021 | 33° | 18° | 25° | — | — |
| 2020 | 64° | 39° | 52° | — | — |
| 2019 | 77° | 52° | 64° | — | — |
| 2018 | 51° | 31° | 41° | 0.81" | 1" |
| 2017 | 69° | 38° | 53° | 0.15" | — |
| 2016 | 54° | 38° | 46° | — | — |
| 2015 | 53° | 32° | 43° | 0.08" | — |
| 2014 | 70° | 45° | 57° | — | — |
| 2013 | 61° | 37° | 49° | — | — |
| 2012 | 70° | 49° | 59° | — | — |
| 2011 | 46° | 37° | 42° | 0.08" | — |
| 2010 | 58° | 39° | 48° | — | — |
| 2009 | 73° | 41° | 57° | — | — |
| 2008 | 73° | 35° | 54° | — | — |
| 2007 | 72° | 36° | 54° | — | — |
| 2006 | 67° | 32° | 49° | — | — |
| 2005 | 50° | 32° | 41° | 0.56" | — |
| 2004 | 64° | 40° | 52° | — | — |
| 2003 | 55° | 32° | 44° | — | — |
| 2002 | 52° | 26° | 39° | — | — |
| 2001 | 64° | 32° | 48° | — | — |
| 2000 | 61° | 38° | 49° | — | — |
| 1999 | 71° | 43° | 57° | — | — |
| 1998 | 51° | 32° | 42° | — | — |
| 1997 | 70° | 43° | 56° | — | — |
| 1996 | 55° | 32° | 44° | — | — |
| 1995 | 46° | 29° | 37° | — | — |
| 1994 | 78° | 41° | 60° | — | — |
| 1993 | 48° | 27° | 37° | — | — |
| 1992 | 59° | 32° | 46° | — | — |
| 1991 | 56° | 37° | 46° | 0.41" | — |
| 1990 | 67° | 44° | 55° | 0.03" | — |
| 1989warmest | 81° | 47° | 64° | — | — |
| 1988 | 71° | 50° | 61° | — | — |
| 1987 | 37° | 26° | 32° | — | — |
| 1986 | 67° | 42° | 54° | 0.05" | — |
| 1985 | 74° | 34° | 54° | — | — |
| 1984 | 40° | 29° | 34° | 2.16" | 10" |
| 1983 | 62° | 40° | 51° | 1.09" | — |
| 1982coldest | 34° | 14° | 24° | — | — |
| 1981 | 58° | 38° | 48° | 0.03" | — |
| 1980 | 78° | 47° | 62° | — | — |
| 1979 | 61° | 36° | 48° | — | — |
| 1978 | 63° | 37° | 50° | — | — |
| 1977 | 48° | 31° | 39° | 0.25" | — |
| 1976 | 58° | 40° | 49° | — | — |
| 1975 | 58° | 32° | 45° | — | — |
| 1974 | 60° | 37° | 49° | — | — |
| 1973 | 50° | 29° | 39° | — | — |
| 1972 | 50° | 32° | 41° | — | — |
| 1971 | 55° | 33° | 44° | — | — |
55 years of data from LAKEWOOD