Weather on April 21 at Rocky Mountain
Rocky Mountain National Park
Based on 56 years of data from Estes Park, CO
Elevation Note: Rocky Mountain sits at 8,000 ft. Expect temperatures 28°F cooler than the data shown below, which comes from Estes Park, CO at a lower elevation.
Planning Your Visit
April 21st in Rocky Mountain National Park (via Estes Park, CO) typically brings cool spring weather, with average highs around 53°F and lows near 28°F — a 25°F daily swing. Over 56 years of records, the warmest April 21st was in 2019 (58°F average), while the coldest was 2021 (22°F) — a 36°F range across recorded history. Precipitation has occurred on 34% of recorded April 21st dates, with snow falling 18% of the time (heaviest snowfall: 4.7"). The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Rocky Mountain? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 69°F | 28°F | 0" | -- |
| 2025 | 53°F | 30°F | 0" | 0" |
| 2024 | 49°F | 21°F | 0" | 0" |
| 2023 | 36°F | 21°F | 0" | 0" |
| 2022 | 71°F | 29°F | -- | -- |
| 2021 | 31°F | 14°F | -- | -- |
| 2020 | 53°F | 24°F | 0" | 0" |
| 2019 | 69°F | 46°F | 0" | 0" |
| 2018 | 53°F | 26°F | 0" | 0" |
| 2017 | 49°F | 29°F | 1.5" | 2" |
| 2016 | 50°F | 27°F | 0" | 0" |
| 2015 | 47°F | 26°F | 0" | 0.1" |
| 2014 | 62°F | 33°F | 0.05" | 0" |
| 2013 | 45°F | 30°F | 0.03" | 0" |
| 2012 | 57°F | 31°F | 0" | 0" |
| 2011 | 50°F | 25°F | 1.24" | 1.8" |
| 2010 | 62°F | 33°F | 0" | 0" |
| 2009 | 56°F | 40°F | 0" | 0" |
| 2008 | 58°F | 27°F | 0" | 0" |
| 2007 | 59°F | 25°F | 0" | 0" |
| 2006 | 56°F | 24°F | 0" | 0" |
| 2005 | 47°F | 29°F | 0.38" | 0.3" |
| 2004 | 49°F | 32°F | 0.03" | 0.1" |
| 2003 | 48°F | 26°F | 0" | 0" |
| 2002 | 31°F | 21°F | 0.84" | 4.2" |
| 2001 | 41°F | 30°F | -- | -- |
| 2000 | 54°F | 26°F | 0" | 0" |
| 1999 | 58°F | 29°F | 0.05" | 0.3" |
| 1998 | 39°F | 22°F | 0.81" | 4.7" |
| 1997 | 53°F | 32°F | 1.22" | 0" |
| 1996 | 39°F | 19°F | 0.2" | 1.2" |
| 1995 | 39°F | 20°F | 0.15" | 0.6" |
| 1994 | 64°F | 18°F | 0" | 0" |
| 1993 | 58°F | 17°F | 0" | 0" |
| 1992 | 57°F | 36°F | 0.03" | 0" |
| 1991 | 50°F | 39°F | 0" | 0" |
| 1990 | 66°F | 32°F | 0" | 0" |
| 1989 | 75°F | 30°F | 0" | 0" |
| 1988 | 59°F | 35°F | 0" | 0" |
| 1987 | 49°F | 14°F | 0.08" | -- |
| 1986 | 61°F | 39°F | 0.08" | 0" |
| 1985 | 49°F | 35°F | 0.25" | 0" |
| 1984 | 31°F | 21°F | 2.18" | 0" |
| 1983 | 54°F | 33°F | 1.78" | 0" |
| 1982 | 44°F | 2°F | 0" | 0" |
| 1981 | 57°F | 40°F | 0" | 0" |
| 1980 | 69°F | 28°F | 0" | 0" |
| 1979 | 62°F | 22°F | 0" | -- |
| 1978 | 57°F | 22°F | 0" | -- |
| 1977 | 54°F | 21°F | 0" | 0" |
| 1976 | 58°F | 40°F | 0" | 0" |
| 1975 | 47°F | 26°F | 0" | -- |
| 1974 | 50°F | 35°F | 0" | -- |
| 1973 | 43°F | 28°F | 0" | -- |
| 1972 | 52°F | 29°F | 0" | -- |
| 1971 | 50°F | 31°F | 0.03" | -- |