Weather on December 15 at Rocky Mountain
Rocky Mountain National Park
Based on 52 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 15th in Rocky Mountain National Park (via Estes Park, CO) typically brings cold winter weather, with average highs around 37°F and lows near 18°F. Over 52 years of records, the warmest December 15th was in 2025 (48°F average), while the coldest was 2007 (5°F) — a 43°F range across recorded history. Precipitation has occurred on 13% of recorded December 15th dates, with snow falling 13% of the time (heaviest snowfall: 4"). The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for December 15th in Rocky Mountain? Bundle up with warm layers and protect extremities from the cold.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 60°F | 36°F | 0" | -- |
| 2024 | 49°F | 34°F | 0" | 0" |
| 2023 | 45°F | 27°F | 0" | 0" |
| 2022 | 27°F | 17°F | 0" | 0" |
| 2021 | 44°F | 18°F | -- | -- |
| 2020 | 36°F | 6°F | -- | 0.5" |
| 2019 | 26°F | 7°F | 0.46" | 4" |
| 2018 | 49°F | 26°F | 0" | 0" |
| 2017 | 34°F | 16°F | 0" | 0" |
| 2016 | 41°F | 15°F | 0.1" | 0.5" |
| 2015 | 38°F | 17°F | 0.66" | 3.9" |
| 2014 | 32°F | 25°F | 0.51" | 3" |
| 2013 | 32°F | 23°F | 0" | 0" |
| 2012 | 39°F | 23°F | 0" | 0" |
| 2011 | 32°F | 15°F | 0" | 0" |
| 2010 | 49°F | 35°F | 0" | 0" |
| 2009 | 30°F | 22°F | 0" | 0" |
| 2008 | 17°F | 1°F | 0.05" | 0.3" |
| 2007 | 17°F | -7°F | 0.2" | 1.1" |
| 2006 | 45°F | 38°F | 0" | 0" |
| 2005 | 18°F | 11°F | 0" | 0" |
| 2004 | 44°F | 31°F | 0" | 0" |
| 2003 | 45°F | 23°F | 0" | 0" |
| 2002 | 45°F | 34°F | 0" | 0" |
| 2001 | 43°F | 19°F | 0" | 0" |
| 2000 | 28°F | 20°F | 0" | 0" |
| 1999 | 14°F | 7°F | 0" | 0" |
| 1998 | 52°F | 15°F | 0" | 0" |
| 1997 | 50°F | 27°F | 0" | 0" |
| 1996 | 20°F | 4°F | 0" | 0" |
| 1995 | 36°F | 22°F | 0" | 0" |
| 1994 | 25°F | 6°F | 0" | 0" |
| 1993 | 39°F | 11°F | 0" | 0" |
| 1992 | 28°F | 14°F | 0" | 0" |
| 1991 | 42°F | 27°F | 0" | 0" |
| 1990 | 36°F | 16°F | 0" | 0" |
| 1989 | 33°F | 11°F | 0" | 0" |
| 1988 | 24°F | 7°F | 0" | 0" |
| 1986 | 46°F | 17°F | 0" | -- |
| 1984 | 39°F | 13°F | 0" | 0" |
| 1983 | 25°F | 14°F | 0.03" | -- |
| 1982 | 34°F | 12°F | 0" | 0" |
| 1981 | 42°F | 11°F | 0" | -- |
| 1980 | 54°F | 37°F | 0" | 0" |
| 1978 | 39°F | 15°F | 0" | -- |
| 1977 | 48°F | 41°F | 0" | -- |
| 1976 | 48°F | 11°F | 0" | 0" |
| 1975 | 36°F | 6°F | 0" | -- |
| 1974 | 28°F | 17°F | 0" | 0" |
| 1973 | 38°F | 20°F | 0" | 0" |
| 1972 | 32°F | -8°F | 0" | -- |
| 1971 | 29°F | 15°F | 0" | -- |