Weather on December 20 at Rocky Mountain
Rocky Mountain National Park
Based on 51 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
December 20th in Rocky Mountain National Park (via Estes Park, CO) typically brings cold winter weather, with average highs around 36°F and lows near 16°F. Over 51 years of records, the warmest December 20th was in 1982 (42°F average), while the coldest was 1998 (-5°F) — a 47°F range across recorded history. Precipitation has occurred on 20% of recorded December 20th dates, with snow falling 24% of the time (heaviest snowfall: 2"). The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Rocky Mountain? Bundle up with warm layers and protect extremities from the cold. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 54°F | 30°F | 0.1" | 0.3" |
| 2024 | 52°F | 30°F | 0" | 0" |
| 2023 | 49°F | 26°F | 0" | 0" |
| 2022 | 33°F | 12°F | 0" | 0" |
| 2021 | 47°F | 26°F | -- | -- |
| 2020 | 31°F | 23°F | 0" | 0" |
| 2019 | 36°F | 17°F | 0" | 0" |
| 2018 | 40°F | 18°F | 0" | 0" |
| 2017 | 45°F | 30°F | 0" | 0" |
| 2016 | 37°F | 24°F | 0" | 0" |
| 2015 | 46°F | 36°F | 0" | 0" |
| 2014 | 32°F | 24°F | 0" | 0" |
| 2013 | 45°F | 11°F | 0" | 0.1" |
| 2012 | 19°F | 5°F | 0.1" | 0.6" |
| 2011 | 27°F | 10°F | 0.05" | 0.6" |
| 2010 | 40°F | 31°F | 1.02" | 0.1" |
| 2009 | 41°F | 7°F | 0" | 0" |
| 2008 | 30°F | 7°F | 0.03" | 0.2" |
| 2007 | 35°F | 28°F | 0" | 0" |
| 2006 | 33°F | 8°F | 0" | 0.1" |
| 2005 | 35°F | 23°F | 0" | 0.1" |
| 2004 | 44°F | 33°F | 0" | 0" |
| 2003 | 51°F | 26°F | 0" | 0" |
| 2002 | 23°F | 15°F | 0" | 0" |
| 2001 | 35°F | 27°F | 0" | 0" |
| 2000 | 39°F | 17°F | 0.13" | 0.8" |
| 1999 | 25°F | 16°F | 0.05" | 0.6" |
| 1998 | 2°F | -12°F | 0.1" | 1.1" |
| 1997 | 21°F | 4°F | 0" | 0" |
| 1996 | 20°F | 11°F | 0" | 0" |
| 1995 | 29°F | 10°F | 0" | 0" |
| 1994 | 40°F | 20°F | 0" | 0" |
| 1993 | 34°F | 2°F | 0" | 0" |
| 1992 | 25°F | 12°F | 0" | 0" |
| 1991 | 40°F | 23°F | 0" | 0" |
| 1990 | 18°F | -12°F | 0.08" | 2" |
| 1989 | 36°F | 24°F | 0" | 0" |
| 1988 | 33°F | 8°F | 0" | 0" |
| 1986 | 36°F | 9°F | 0" | -- |
| 1984 | 39°F | 9°F | 0" | 0" |
| 1983 | 30°F | -6°F | 0.3" | -- |
| 1982 | 49°F | 36°F | 0" | 0" |
| 1980 | 46°F | 12°F | 0" | 0" |
| 1978 | 31°F | 9°F | 0" | -- |
| 1977 | 22°F | 9°F | 0" | -- |
| 1976 | 44°F | -3°F | 0" | 0" |
| 1975 | 47°F | 7°F | 0" | -- |
| 1974 | 31°F | 19°F | 0" | 0" |
| 1973 | 46°F | -5°F | 0" | 0" |
| 1972 | 40°F | 31°F | 0" | -- |
| 1971 | 38°F | 26°F | 0" | -- |