Rocky Mountain National Park (CO) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rocky Mountain National Park.
Climate overview of Rocky Mountain National Park
Rocky Mountain National Park, Colorado, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 19°C (66°F) in July, while winters cool to -3°C (27°F) in December.
Annual rain/snowfall is moderate at around 967 mm (38 in), with April being the wettest month. The city also has pleasant summers and very cold winters.
Rocky Mountain National Park Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rocky Mountain National Park - and find the best time to visit.
Monthly Temperature in Rocky Mountain National Park
Depending on the time of the year, temperatures range from pleasant to very cold in Rocky Mountain National Park. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In December, the coolest month of the year, temperatures drop to a very cold -3°C (27°F).
At night, temperatures range from around 6°C (43°F) in July to -12°C (10°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rocky Mountain National Park
Generally, Rocky Mountain National Park has a moderate amount of precipitation, averaging 967 mm (38 in) of rain/snowfall annually. Rocky Mountain National Park can be quite wet during April, receiving approximately 127 mm (5 in) of precipitation over 21 snowy/rainy days.
In contrast, during the driest month (June), you will experience much drier conditions, with 29 mm (1.1 in) of precipitation spread across 10 rainy days. For more details, please visit our Rocky Mountain National Park Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Rocky Mountain National Park
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July and August
- Fewest rainy days: June and September
- Seasonal pattern: Pleasant summers and very cold winters
- Coldest conditions: December, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Rocky Mountain National Park
What is the best time to visit Rocky Mountain National Park?
June, July and August typically offer the most optimal weather in Rocky Mountain National Park. In contrast, January, February, March, April, May, October, November and December tend to have less optimal conditions. Rocky Mountain National Park has pleasant summers and very cold winters.
What temperatures can I expect in Rocky Mountain National Park?
Daytime highs range from -3°C (27°F) in December to 19°C (66°F) in July. Nighttime lows range from -12°C (10°F) to 6°C (43°F). Temperatures vary considerably through the year.
How much rain does Rocky Mountain National Park get?
Annual rainfall is around 967 mm (38 in). April is the wettest month with 127 mm (5 in), while June is the driest with 29 mm (1.1 in). In the coldest months, precipitation may fall as snow/rain.
Rocky Mountain National Park 3-Day Forecast
Rocky Mountain National Park on the map
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