Weather on March 21 at Rocky Mountain
Rocky Mountain National Park
Based on 55 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
March 21st in Rocky Mountain National Park (via Estes Park, CO) typically brings chilly spring weather, with average highs around 47°F and lows near 22°F — a 25°F daily swing. Over 55 years of records, the warmest March 21st was in 2026 (51°F average), while the coldest was 1983 (10°F) — a 41°F range across recorded history. Precipitation has occurred on 15% of recorded March 21st dates, with snow falling 7% of the time (heaviest snowfall: 4.5"). The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Rocky Mountain? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 74°F | 29°F | 0" | -- |
| 2025 | 43°F | 25°F | 0" | 0" |
| 2024 | 52°F | 23°F | 0" | 0" |
| 2023 | 45°F | 27°F | 0.03" | 0" |
| 2022 | 37°F | 13°F | -- | -- |
| 2021 | 43°F | 22°F | -- | -- |
| 2020 | 30°F | 8°F | 0" | 0" |
| 2019 | 50°F | 11°F | 0" | 0" |
| 2018 | 33°F | 24°F | 0" | 0" |
| 2017 | 64°F | 32°F | 0" | 0" |
| 2016 | 48°F | 0°F | 0" | 0" |
| 2015 | 56°F | 18°F | 0" | 0" |
| 2014 | 48°F | 32°F | 0" | 0" |
| 2013 | 49°F | 31°F | 0" | 0" |
| 2012 | 42°F | 22°F | 0" | 0" |
| 2011 | 52°F | 27°F | 0" | 0" |
| 2010 | 33°F | -7°F | 0" | 0" |
| 2009 | 55°F | 25°F | 0" | 0" |
| 2008 | 45°F | 28°F | 0" | 0" |
| 2007 | 60°F | 40°F | 0" | 0" |
| 2006 | 22°F | 8°F | 0.18" | 1.3" |
| 2005 | 48°F | 27°F | 0.05" | 0.4" |
| 2004 | 53°F | 24°F | 0" | 0" |
| 2003 | 38°F | 15°F | 0.05" | 0.5" |
| 2002 | 49°F | 11°F | 0" | 0" |
| 2001 | 58°F | 29°F | -- | -- |
| 2000 | 22°F | 12°F | 0.64" | 4.5" |
| 1999 | 51°F | 24°F | 0" | 0" |
| 1998 | 40°F | 20°F | 0" | 0" |
| 1997 | 60°F | 31°F | 0" | 0" |
| 1996 | 48°F | 31°F | 0" | 0" |
| 1995 | 46°F | 31°F | 0" | 0" |
| 1994 | 56°F | 31°F | 0" | 0" |
| 1993 | 50°F | 33°F | 0" | 0" |
| 1991 | 46°F | 25°F | 0" | 0" |
| 1990 | 57°F | 39°F | 0" | 0" |
| 1989 | 49°F | 18°F | 0" | 0" |
| 1988 | 60°F | 32°F | 0" | 0" |
| 1987 | 35°F | 21°F | 0" | -- |
| 1986 | 56°F | 33°F | 0" | -- |
| 1985 | 51°F | 18°F | 0" | 0" |
| 1984 | 51°F | 23°F | 0" | 0" |
| 1983 | 30°F | -10°F | 0" | 0" |
| 1982 | 36°F | 9°F | 0" | 0" |
| 1981 | 40°F | 30°F | 0" | 0" |
| 1980 | 54°F | 15°F | 0" | 0" |
| 1979 | 39°F | 22°F | 0.05" | 0" |
| 1978 | 59°F | 39°F | 0" | -- |
| 1977 | 38°F | 10°F | 0.05" | 0" |
| 1976 | 33°F | 21°F | 0" | -- |
| 1975 | 54°F | 31°F | 0.38" | 0" |
| 1974 | 39°F | 3°F | 0" | -- |
| 1973 | 48°F | 23°F | 0" | 0" |
| 1972 | 59°F | 35°F | 0" | -- |
| 1971 | 50°F | 34°F | 0" | -- |