Weather on December 18 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 18th in Rocky Mountain National Park (via Estes Park, CO) typically brings cold winter weather, with average highs around 37°F and lows near 17°F. Over 51 years of records, the warmest December 18th was in 2018 (43°F average), while the coldest was 1996 (-6°F) — a 49°F range across recorded history. Precipitation has occurred on 18% of recorded December 18th dates, with snow falling 16% of the time (heaviest snowfall: 7.4"). The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Rocky Mountain? Bundle up with warm layers and protect extremities from the cold.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 51°F | 22°F | 0.03" | -- |
| 2024 | 41°F | 21°F | 0" | 0" |
| 2023 | 54°F | 14°F | 0" | 0" |
| 2022 | 35°F | 24°F | 0" | 0" |
| 2021 | 36°F | 17°F | -- | -- |
| 2020 | 39°F | 30°F | 0" | 0" |
| 2019 | 39°F | 17°F | 0" | 0" |
| 2018 | 50°F | 36°F | 0" | 0" |
| 2017 | 37°F | 21°F | 0" | 0" |
| 2016 | 11°F | -12°F | 0" | 0" |
| 2015 | 26°F | 13°F | 0" | 0" |
| 2014 | 38°F | 15°F | 0" | 0.1" |
| 2013 | 47°F | 36°F | 0" | 0" |
| 2012 | 32°F | 22°F | 0.13" | 1" |
| 2011 | 48°F | 16°F | 0" | 0" |
| 2010 | 27°F | 11°F | 0" | 0" |
| 2009 | 36°F | 24°F | 0" | 0" |
| 2008 | 28°F | 14°F | 0" | 0" |
| 2007 | 38°F | 27°F | 0" | 0" |
| 2006 | 18°F | 3°F | 1.04" | 7.4" |
| 2005 | 10°F | -1°F | 0.1" | 0.7" |
| 2004 | 43°F | 29°F | 0" | 0" |
| 2003 | 40°F | 22°F | 0" | 0" |
| 2002 | 38°F | 23°F | 0.03" | 0.2" |
| 2001 | 42°F | 28°F | 0" | 0" |
| 2000 | 39°F | 9°F | 0.15" | 1.2" |
| 1999 | 36°F | 20°F | 0" | 0" |
| 1998 | 44°F | 25°F | 0" | 0" |
| 1997 | 38°F | 30°F | 0" | 0" |
| 1996 | -2°F | -11°F | 0" | 0" |
| 1995 | 25°F | -2°F | 0.1" | 1" |
| 1994 | 46°F | 19°F | 0" | 0" |
| 1993 | 36°F | 22°F | 0" | 0" |
| 1992 | 28°F | 18°F | 0" | 0" |
| 1991 | 43°F | 9°F | 0" | 0" |
| 1990 | 30°F | 20°F | 0" | 0" |
| 1989 | 16°F | 1°F | 0" | 0" |
| 1988 | 47°F | 30°F | -- | -- |
| 1986 | 44°F | 0°F | 0" | -- |
| 1984 | 41°F | 5°F | 0" | 0" |
| 1983 | 24°F | -5°F | 0" | -- |
| 1981 | 41°F | 12°F | 0" | -- |
| 1980 | 56°F | 29°F | 0" | 0" |
| 1978 | 45°F | 39°F | 0" | -- |
| 1977 | 35°F | 26°F | 0.08" | -- |
| 1976 | 54°F | 12°F | 0" | 0" |
| 1975 | 45°F | 5°F | 0" | -- |
| 1974 | 36°F | 21°F | 0" | 0" |
| 1973 | 47°F | 19°F | 0.25" | 2" |
| 1972 | 46°F | 35°F | 0" | -- |
| 1971 | 53°F | 28°F | 0" | -- |