Weather on August 18 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
August 18th in Rocky Mountain National Park (via Estes Park, CO) typically brings pleasant summer weather, with average highs around 76°F and lows near 46°F — a 30°F daily swing. Over 55 years of records, the warmest August 18th was in 2023 (73°F average), while the coldest was 2008 (49°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 53% of August 18th dates historically, with the wettest August 18th recording 0.59" of rain. The last decade has been 6.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.7°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Rocky Mountain? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 80°F | 44°F | 0" | -- |
| 2025 | 82°F | 44°F | 0" | -- |
| 2024 | 89°F | 58°F | 0.03" | 0" |
| 2023 | 83°F | 64°F | 0" | 0" |
| 2022 | 80°F | 46°F | -- | -- |
| 2021 | 81°F | 51°F | -- | -- |
| 2020 | 85°F | 50°F | 0" | 0" |
| 2019 | 77°F | 44°F | 0.15" | 0" |
| 2018 | 82°F | 48°F | 0.02" | 0" |
| 2017 | 75°F | 46°F | 0" | 0" |
| 2016 | 79°F | 47°F | 0" | 0" |
| 2015 | 74°F | 43°F | 0.08" | 0" |
| 2014 | 82°F | 46°F | 0" | 0" |
| 2013 | 85°F | 49°F | 0" | 0" |
| 2012 | 81°F | 42°F | 0.05" | 0" |
| 2011 | 85°F | 47°F | 0" | 0" |
| 2010 | 79°F | 45°F | 0" | 0" |
| 2009 | 65°F | 39°F | 0.04" | 0" |
| 2008 | 61°F | 38°F | 0.01" | 0" |
| 2007 | 82°F | 52°F | 0" | 0" |
| 2006 | 81°F | 51°F | 0.27" | 0" |
| 2005 | 71°F | 53°F | 0" | 0" |
| 2004 | 76°F | 53°F | 0.15" | 0" |
| 2003 | 70°F | 49°F | 0.13" | 0" |
| 2002 | 74°F | 45°F | 0" | 0" |
| 2001 | 75°F | 42°F | 0" | 0" |
| 2000 | 66°F | 42°F | 0.45" | 0" |
| 1999 | 68°F | 39°F | 0.16" | 0" |
| 1998 | 75°F | 45°F | 0" | 0" |
| 1997 | 73°F | 44°F | 0" | 0" |
| 1996 | 65°F | 46°F | 0.2" | -- |
| 1995 | 76°F | 49°F | 0" | 0" |
| 1994 | 76°F | 46°F | 0" | 0" |
| 1993 | 82°F | 48°F | 0.01" | 0" |
| 1992 | 64°F | 39°F | 0.1" | -- |
| 1991 | 69°F | 45°F | 0.15" | 0" |
| 1990 | 68°F | 43°F | 0.59" | 0" |
| 1989 | 68°F | 34°F | 0" | 0" |
| 1988 | 78°F | 42°F | 0.15" | 0" |
| 1987 | 76°F | 37°F | 0" | 0" |
| 1985 | 70°F | 50°F | 0.01" | 0" |
| 1984 | 71°F | 51°F | 0.13" | 0" |
| 1983 | 79°F | 48°F | 0.5" | 0" |
| 1982 | 82°F | 49°F | 0.02" | 0" |
| 1981 | 74°F | 48°F | 0.01" | 0" |
| 1980 | 79°F | 37°F | 0" | 0" |
| 1979 | 70°F | 51°F | 0.09" | 0" |
| 1978 | 78°F | 45°F | 0.03" | 0" |
| 1977 | 68°F | 54°F | 0.24" | 0" |
| 1976 | 74°F | 47°F | 0.01" | 0" |
| 1975 | 78°F | 38°F | 0" | 0" |
| 1974 | 83°F | 37°F | 0" | 0" |
| 1973 | 73°F | 54°F | 0.1" | 0" |
| 1972 | 77°F | 43°F | 0" | 0" |
| 1971 | 77°F | 49°F | 0.02" | 0" |