Weather on April 21
Denver, CO
55 Years of Data
Avg High
64°F
Avg Low
35°F
Warmest
1989
67°F avg
Coldest
2021
27°F avg
About This Date
April 21st in Denver, CO typically brings mild spring weather, with average highs around 64°F and lows near 35°F — a 29°F daily swing. Over 55 years of records, the warmest April 21st was in 1989 (67°F average), while the coldest was 2021 (27°F) — a 40°F range across recorded history. Precipitation has occurred on 29% of recorded April 21st dates, with snow falling 5% of the time (heaviest snowfall: 10.6"). The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Denver, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 34° | 50° | — | — |
| 2024 | 34° | 28° | 31° | — | — |
| 2023 | 55° | 30° | 43° | — | — |
| 2022 | 73° | 41° | 57° | — | — |
| 2021coldest | 35° | 20° | 27° | 0.03" | — |
| 2020 | 71° | 39° | 55° | — | — |
| 2019 | 84° | 38° | 61° | — | — |
| 2018 | 58° | 36° | 47° | 1.55" | 1.8" |
| 2017 | 65° | 41° | 53° | 0.84" | — |
| 2016 | 57° | 37° | 47° | — | — |
| 2015 | 59° | 35° | 47° | — | — |
| 2014 | 73° | 41° | 57° | — | — |
| 2013 | 61° | 34° | 47° | — | — |
| 2012 | 73° | 44° | 59° | — | — |
| 2011 | 53° | 32° | 43° | 0.15" | — |
| 2010 | 62° | 41° | 52° | — | — |
| 2009 | 74° | 41° | 57° | — | — |
| 2008 | 79° | 34° | 56° | — | — |
| 2007 | 75° | 40° | 57° | — | — |
| 2006 | 70° | 34° | 52° | — | — |
| 2005 | 55° | 35° | 45° | 0.81" | — |
| 2004 | 71° | 34° | 52° | — | — |
| 2003 | 71° | 32° | 52° | — | — |
| 2002 | 62° | 26° | 44° | — | — |
| 2001 | 49° | 32° | 40° | 0.38" | — |
| 2000 | 78° | 37° | 58° | — | — |
| 1999 | 73° | 40° | 56° | — | — |
| 1998 | 62° | 31° | 46° | — | — |
| 1997 | 66° | 37° | 52° | — | — |
| 1996 | 52° | 30° | 41° | 0.05" | — |
| 1995 | 43° | 33° | 38° | 0.66" | — |
| 1994 | 77° | 43° | 60° | — | — |
| 1993 | 67° | 30° | 48° | — | — |
| 1992 | 68° | 31° | 49° | — | — |
| 1991 | 53° | 38° | 45° | 0.71" | — |
| 1990 | 74° | 44° | 59° | — | — |
| 1989warmest | 90° | 45° | 67° | — | — |
| 1988 | 72° | — | — | 0.18" | — |
| 1987 | 59° | 29° | 44° | — | — |
| 1986 | 66° | 41° | 54° | 0.03" | — |
| 1985 | 57° | 41° | 49° | — | — |
| 1984 | 35° | 30° | 33° | 1.63" | 10.6" |
| 1983 | 67° | 44° | 55° | 0.13" | — |
| 1982 | 55° | 15° | 35° | 0.05" | 0.2" |
| 1981 | 75° | 41° | 58° | — | — |
| 1980 | 85° | 43° | 64° | — | — |
| 1979 | 73° | 32° | 53° | — | — |
| 1978 | 68° | 32° | 50° | — | — |
| 1977 | 61° | 31° | 46° | — | — |
| 1976 | 70° | 37° | 53° | — | — |
| 1975 | 65° | 33° | 49° | — | — |
| 1974 | 61° | 35° | 48° | — | — |
| 1973 | 55° | 29° | 42° | 0.03" | — |
| 1972 | 65° | 28° | 46° | — | — |
| 1971 | 64° | 33° | 49° | 0.89" | — |
55 years of data from NORTHGLENN