Late spring · Weather & things to do
Rocky Mountain NP in May
The year's rain or snow peaks now, with about 2.7 in (69 mm) falling in Rocky Mountain NP, alongside highs near 54°F (12°C) and lows of 28°F (-2°C).
Our comfort score puts it mid-table at 67/100, 5th of 12.
- Avg high
- 54°F (12°C)
- Avg low
- 28°F (-2°C)
- Rain or snow
- 2.7 in (69 mm)
- Humidity
- 61%
- Cloud cover
- 67%
- Daylight
- ~14 h 14 min
- Comfort score
- 67/100 · Good
What May feels like
Afternoons only reach about 54°F (12°C), so plan on a warm jacket.
Average lows of 28°F (-2°C) mean frosty nights and icy mornings.
Expect about 2.7 in (69 mm) of precipitation (rain or snow). Because nights fall well below freezing, snow is likely on some days.
Plan around May
May sits mid-table; the best months are June – September.
- Last month with freezing nights on average; by June, lows rise to 38°F.
- Inside the wettest three-month stretch, March – May.
- Comfort improves from 50/100 in April to 67/100.
- Our Colorado Rockies route recommends Jun – Sep, so May falls outside its suggested window.
What to pack for May
- Insulated jackethighs only 54°F
- Hat, gloves and thermal base layerslows around 28°F
- Insulated, waterproof bootssnow is likely on some days
- Waterproof outer layerabout 2.7 in of rain or snow
- Comfortable walking shoesmost picks involve some walking
What to do in Rocky Mountain NP in May
May is good outdoor weather here, so these picks lean toward the open air.
The Stanley Hotel
1909 hotel that inspired Stephen King's The Shining; offers history and ghost tours.
Sprague Lake
Easy, flat loop with mirror reflections of the Continental Divide.
Why now May scores 67/100 for comfort, good conditions for being outside.
Alpine Visitor Center
Highest visitor center in the National Park System, with tundra trails and a cafe.
Why now Highs near 54°F and 2.7 in of monthly rain make this an easy outdoor pick.
Bear Lake
Flat half-mile loop around a subalpine lake under Hallett Peak, and the trailhead for the park's classic hikes.
Why now One to do outside while the weather is on your side.
Alberta Falls
Easy 1.6-mile round-trip hike to a 30-foot cascade on Glacier Creek.
Nearby in May
- Denver in May~56 mi · highs 75°F, 2.3 in rain · 12°C (21°F) warmer by day, about as wet
- Vail in May~60 mi · highs 58°F, 2.1 in rain · 2°C (4°F) warmer by day, drier
- Breckenridge in May~62 mi · highs 53°F, 2.1 in rain · similar daytime temperatures, drier
- Aspen in May~100 mi · highs 60°F, 1.7 in rain · 3°C (6°F) warmer by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~2,670 m to Rocky Mountain NP's ~2,918 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Rocky Mountain NP in May: quick answers
Is May a good time to visit Rocky Mountain NP?
It's middling, scoring 67/100. The best months are June – September, at up to 93. Expect highs of 54°F (12°C) and 2.7 in (69 mm) of rain or snow. Our Colorado Rockies route recommends Jun – Sep, so May is outside its suggested window.
How cold is Rocky Mountain NP in May?
Average highs are 54°F (12°C) and average lows 28°F (-2°C), making it the 5th-warmest month by daytime highs, with nights below freezing on average.
Does it snow a lot in Rocky Mountain NP in May?
Some: about 2.7 in (69 mm) of rain or snow falls across May on average, the wettest month of the year. With temperatures this low, much of it may fall as snow. The annual total is about 21.8 in (553 mm).
What should I pack for Rocky Mountain NP in May?
Bring insulated jacket (highs only 54°F), hat, gloves and thermal base layers (lows around 28°F), insulated, waterproof boots (snow is likely on some days), waterproof outer layer (about 2.7 in of rain or snow) and comfortable walking shoes (most picks involve some walking).
More on Rocky Mountain NP
Planning Rocky Mountain NP in May?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.