Rocky Mountain National Park in May
In May, Rocky Mountain National Park averages a high of 59°F and a low of 28°F, with 1.6 inches of precipitation (rain plus melted snow) and 5.3 inches of snowfall. About 326,000 people visit, the 6th busiest of 12 (moderate). Days are 14 hours 24 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 59° / 28°F
- Precipitation
- 1.6in
- Snow
- 5.3in
- Daylight
- 14h 24m
- Visitors
- 326,000
- Crowds
- Moderate
Best months for weather and crowds instead: June (very busy).
Higher or lower in the park, expect a different picture: Waterdale, CO at 5,230 ft averages a May high of 68°F and a low of 41°F.
Weather 1991–2020 averages at Grand Lake 1 NW, CO, 9.2 miles from the park's center, 8,720 ft. Second station lower down: Waterdale, CO, 5,230 ft, 26.4 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in May
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Black Canyon of the Gunnison National Park | 66° / 38° | Busy | Mild |
| Great Sand Dunes National Park | 66° / 38° | Busy | Mild, wet |
| Arches National Park | 80° / 53° | Very busy | Hot |
| Wind Cave National Park | 66° / 41° | Busy | Mild, wet |
| Mesa Verde National Park | 69° / 43° | Busy | Mild |
Closures, reservations and alerts: Rocky Mountain National Park on nps.gov
All twelve months at Rocky Mountain · National parks to visit in May