Rocky Mountain National Park weather in May
May in Rocky Mountain National Park: cold, rainy, with reliable snow — a great time to visit.
#6 of 12 months in Rocky Mountain National Park · #397 of 604 destinations to visit in May · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Rocky Mountain National Park climate normals — May
| Daytime high | 10°C / 50°F | 🧥 cold |
|---|---|---|
| Nighttime low | -2°C / 29°F | |
| Feels like (high) | 8°C / 46°F | |
| Rainfall | 81 mm / 3.2 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 66% | 💧 humid |
| Dew point | -2°C / 28°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 14.4 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 31.7 cm / 12.5 in | |
| Air quality (US AQI) | 58 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Rocky Mountain National Park?
Loading map…
Rocky Mountain National Park in May — FAQ
- Is May a good time to visit Rocky Mountain National Park?
- May in Rocky Mountain National Park: cold, rainy, with reliable snow — a great time to visit. It ranks #6 of 12 months for Rocky Mountain National Park on SeasonMap's comfort score (77/100).
- What is the weather like in Rocky Mountain National Park in May?
- In May, Rocky Mountain National Park averages a daily high of 9.9°C and a low of -1.6°C, with about 80.8 mm of rain over roughly 16.6 rainy days.
- What is the air quality in Rocky Mountain National Park in May?
- Rocky Mountain National Park has a mean US Air Quality Index of about 58 in May.
- Does it snow in Rocky Mountain National Park in May?
- Rocky Mountain National Park sees roughly 31.7 cm of snowfall in May.