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Mount Blue Sky

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Mount Blue Sky Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Mount Blue Sky year round climate

  • Spring (March–May): Average -52.5°F–-35.2°F, cold and dry climate, temperatures gradually rising, but warmth is still necessary. Common activities: Snow activities (depending on snow conditions), enjoying snow scenery. Recommended clothing: Thick down jacket, thermal underwear, windproof and waterproof jacket, hat, gloves, scarf.
  • Summer (June–August): Average 38.8°F–46.0°F, temperatures higher than spring, but still low, rainy. Common activities: Mountain hiking (pay attention to weather changes), observing wildlife. Recommended clothing: Waterproof and breathable jacket, warm clothing, hiking boots.
  • Autumn (September–November): Average 40.5°F–-50.5°F, temperatures drop significantly, dry, large temperature difference between day and night. Common activities: Enjoying autumn scenery (depending on tree species), photography. Recommended clothing: Warm jacket, layered clothing, hat, gloves.
  • Winter (December–February): Average -57.0°F–-54.3°F, cold and dry climate, heavy snowfall. Common activities: Skiing, snow activities. Recommended clothing: Thick down jacket, thermal underwear, windproof and waterproof jacket, hat, gloves, scarf, snow boots.

Mount Blue Sky climatological average

Annual average temperature: approx. -37.4°F / Annual rainfall: approx. 774 mm / Summer humidity: 40%–50% / Rainiest month: August

Mount Blue Sky monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
7°F
64
February
9°F
41.4
March
11.5°F
76.3
April
19.8°F
77.6
May
28.8°F
75.6
June
38.8°F
42.4
July
46.9°F
103.7
August
46°F
108.3
September
40.5°F
45.2
October
29.1°F
36.3
November
13.5°F
46
December
9.7°F
57.7

Mount Blue Sky weather for the next seven days

12/17
Wednesday
Moderate or heavy snow showers
38.3°F/14.5°F
12/18
Thursday
Moderate or heavy snow showers
24.6°F/1.6°F
12/19
Friday
Sunny
39.9°F/17.6°F
12/20
Saturday
Patchy snow nearby
32.9°F/14.2°F
12/21
Sunday
Sunny
40.4°F/14.5°F
12/22
Monday
Sunny
45.4°F/21.2°F
12/23
Tuesday
Sunny
44.9°F/21.6°F

Mount Blue Sky Frequently Asked Questions and Useful Information for Travel

Why is Mount Blue Sky closed in 2025?

Mount Blue Sky's Scenic Byway is closed until Spring 2026 due to a large-scale construction project. This essential work is necessary to repair the roadway's pavement, which is deteriorating due to the fragile alpine environment and water damage. The project includes rebuilding sections, constructing a rock embankment, and improving drainage to ensure public safety and protect the delicate ecosystem.

Can I drive to Mount Blue Sky in 2025?

No, you cannot currently drive to the summit of Mount Blue Sky in 2025. The Mount Blue Sky Scenic Byway is closed for extensive repairs and infrastructure improvements and is scheduled to reopen for Memorial Day 2026. The road has been closed to repave a section near Summit Lake which is in poor condition due to freeze-thaw cycles.

What should I expect when Mount Blue Sky reopens?

When Mount Blue Sky reopens, a timed entry reservation will be required during the operating season to drive the byway to the summit. Be prepared for a narrow, winding path with sheer drop-offs and switchbacks as you ascend North America's highest paved road. The weather at the summit can change rapidly, so expect significant temperature drops and potential afternoon thunderstorms.

How long does it take to drive up Mount Blue Sky?

The drive from downtown Denver to the 14,260-foot summit of Mount Blue Sky is approximately 60 miles one way and passes through five distinct climate zones. Due to the numerous twists, turns, and switchbacks along the mountain road, plan for the drive to take at least two to three hours each way.

Is the hike to the summit of Mount Blue Sky challenging?

The trail to the summit of Mount Blue Sky is considered tough and involves significant scrambling over rocks. It is highly recommended to start your hike early in the day to avoid needing assistance for your return trip to Summit Lake.