Weather on May 21
Denver, CO
55 Years of Data
Avg High
74°F
Avg Low
44°F
Warmest
2005
76°F avg
Coldest
2022
34°F avg
About This Date
May 21st in Denver, CO typically brings pleasant spring weather, with average highs around 74°F and lows near 44°F — a 30°F daily swing. Over 55 years of records, the warmest May 21st was in 2005 (76°F average), while the coldest was 2022 (34°F) — a 42°F range across recorded history. Precipitation has occurred on 33% of recorded May 21st dates, with snow falling 4% of the time (heaviest snowfall: 3.2"). The last decade has been 10.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 10.3°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Denver, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 41° | 58° | — | — |
| 2024 | 68° | 42° | 55° | 0.03" | — |
| 2023 | 72° | 45° | 58° | — | — |
| 2022coldest | 38° | 30° | 34° | 3.05" | 2.5" |
| 2021 | 81° | — | — | — | — |
| 2020 | 86° | 43° | 64° | — | — |
| 2019 | 57° | 34° | 45° | 1.6" | 3.2" |
| 2018 | 56° | 41° | 48° | 0.25" | — |
| 2017 | 66° | 38° | 52° | — | — |
| 2016 | 80° | 49° | 64° | — | — |
| 2015 | 44° | 36° | 40° | — | — |
| 2014 | 74° | 50° | 62° | — | — |
| 2013 | 66° | 43° | 54° | 0.33" | — |
| 2012 | 74° | 38° | 56° | — | — |
| 2011 | 61° | 42° | 51° | 0.05" | — |
| 2010 | 71° | 47° | 59° | — | — |
| 2009 | 85° | 53° | 69° | — | — |
| 2008 | 88° | 55° | 71° | — | — |
| 2007 | 87° | 49° | 68° | 0.08" | — |
| 2006 | 94° | 52° | 73° | — | — |
| 2005warmest | 92° | 60° | 76° | — | — |
| 2004 | 77° | 52° | 64° | — | — |
| 2003 | 83° | 38° | 60° | — | — |
| 2002 | 84° | 45° | 64° | — | — |
| 2001 | 79° | 32° | 55° | — | — |
| 2000 | 81° | 45° | 63° | — | — |
| 1999 | 82° | 46° | 64° | — | — |
| 1998 | 84° | 51° | 68° | — | — |
| 1997 | 80° | 49° | 64° | 0.1" | — |
| 1996 | 72° | 41° | 56° | 0.05" | — |
| 1995 | 74° | 43° | 58° | 0.08" | — |
| 1994 | 76° | 46° | 61° | — | — |
| 1993 | 81° | 50° | 65° | — | — |
| 1992 | 78° | 51° | 65° | 0.3" | — |
| 1991 | 80° | 54° | 67° | — | — |
| 1990 | 79° | 43° | 61° | — | — |
| 1989 | 77° | 45° | 61° | — | — |
| 1988 | 59° | 40° | 49° | 0.03" | — |
| 1987 | 51° | 41° | 46° | 1.09" | — |
| 1986 | 85° | 47° | 66° | — | — |
| 1985 | 61° | 41° | 51° | — | — |
| 1984 | 79° | 50° | 64° | — | — |
| 1983 | 72° | 37° | 54° | 0.03" | — |
| 1982 | 70° | 39° | 54° | 0.08" | — |
| 1981 | 71° | 43° | 57° | — | — |
| 1980 | 78° | 52° | 65° | — | — |
| 1979 | 73° | 44° | 59° | — | — |
| 1978 | 71° | 49° | 60° | — | — |
| 1977 | 67° | 34° | 50° | 0.1" | — |
| 1976 | 68° | 50° | 59° | — | — |
| 1975 | 50° | 40° | 45° | 0.1" | — |
| 1974 | 68° | 40° | 54° | — | — |
| 1973 | 76° | 49° | 62° | 0.23" | — |
| 1972 | 83° | 45° | 64° | — | — |
| 1971 | 80° | 39° | 60° | — | — |
55 years of data from NORTHGLENN