Get the app
Best time to visit · Colorado, United States
For the most comfortable weather in Rocky Mountain NP, aim for June – September. June tops our comfort score at 93/100, with highs around 69°F (20°C) and 1.7 in (44 mm) of rain. The toughest months are February & March and December, mainly because of cool days.
Highs run from 24°F to 75°F across the year, and the yearly total is about 21.8 in (553 mm) of rain and snow.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 24°F-4°C | 25°F-4°C | 34°F1°C | 43°F6°C | 54°F12°C | 69°F20°C | 75°F24°C | 71°F22°C | 63°F17°C | 48°F9°C | 35°F2°C | 24°F-4°C |
| Avg low | 8°F-14°C | 7°F-14°C | 13°F-10°C | 20°F-7°C | 28°F-2°C | 38°F4°C | 45°F7°C | 43°F6°C | 35°F2°C | 24°F-4°C | 16°F-9°C | 8°F-14°C |
| Rain/snow | 1.3 in34 mm | 1.5 in39 mm | 1.9 in47 mm | 2.6 in65 mm | 2.7 in69 mm | 1.7 in44 mm | 2.1 in54 mm | 1.7 in44 mm | 1.7 in42 mm | 1.7 in43 mm | 1.4 in35 mm | 1.5 in37 mm |
| Humidity | 78% | 80% | 72% | 64% | 61% | 51% | 52% | 52% | 52% | 59% | 66% | 77% |
| Cloud | 61% | 64% | 65% | 67% | 67% | 51% | 52% | 55% | 46% | 52% | 56% | 62% |
| Comfort | 50 | 49 | 48 | 50 | 67 | 93 | 91 | 91 | 93 | 64 | 51 | 49 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~2,670 m (8,760 ft) to Rocky Mountain NP's ~2,918 m (9,574 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs near 24°F (-4°C) and lows down to 7°F (-14°C). It's the driest season, with only about 4.3 in (110 mm) of rain or snow, 20% of the year's total. December – February are cold enough for snow. Comfort scores bottom out in February and December; the season averages 49/100.
Temperatures climb through the season, from 34°F highs in March to 54°F by May. It's the wettest season, with about 7.1 in (181 mm) of rain or snow, 33% of the year's total. March – May are cold enough for snow. It holds the toughest stretch on our comfort score (March), averaging 55/100.
The warmest stretch of the year, with highs of 69–75°F (20–24°C). About 5.6 in (142 mm) of rain falls across these months, 26% of the year's total. Lows bottom out around 38°F (4°C). Comfort peaks here: June – August rank with the year's best, and the season averages 92/100.
Temperatures slide from 63°F highs in September to 35°F by November. About 4.7 in (120 mm) of rain or snow falls across these months, 22% of the year's total. October & November are cold enough for snow. September is among the best-scoring months (season average 69/100).
By comfort score: 4 Great, 2 Good and 6 Fair. Great months: June – September. Tap a month for its own guide.
For the most comfortable weather in Rocky Mountain NP, aim for June – September. June tops our comfort score at 93/100, with highs around 69°F (20°C) and 1.7 in (44 mm) of rain. The toughest months are February & March and December, mainly because of cool days.
May is the wettest month, averaging about 2.7 in (69 mm) of rain or snow. January is the driest, with about 1.3 in (34 mm). The yearly total is around 21.8 in (553 mm).
February is the coldest, with average lows of 7°F (-14°C) and highs of 25°F (-4°C). The warmest is July, with average highs of 75°F (24°C).
Not very: summer (June – August) humidity averages 52%, and highs peak around 75°F (24°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in October – May, bottoming out around 7°F (-14°C) in February.
Send the group one link: vote on dates, build the plan together and split costs as you go.
