Mountain weather

Forecasts for the most-visited summits and high country. Conditions up top routinely run 15-25°F colder than the trailhead, with wind that can triple — check before you climb.

≤ 0°1–10°11–15°16–20°21°+

Denali

Denali National Park

-33°

6190 m · Summit temperature (est.) · Base temperature 39°

Mount Rainier

Mount Rainier National Park

4°

4392 m · Summit temperature (est.) · Base temperature 56°

Mount Whitney

Sequoia National Park

29°

4421 m · Summit temperature (est.) · Base temperature 81°

Mount Elbert

San Isabel National Forest

1°

4401 m · Summit temperature (est.) · Base temperature 53°

Pikes Peak

Pike National Forest

17°

4302 m · Summit temperature (est.) · Base temperature 67°

Longs Peak

Rocky Mountain National Park

9°

4346 m · Summit temperature (est.) · Base temperature 59°

Grand Teton

Grand Teton National Park

21°

4199 m · Summit temperature (est.) · Base temperature 70°

Mount Hood

Mount Hood National Forest

20°

3429 m · Summit temperature (est.) · Base temperature 60°

Mount Shasta

Shasta-Trinity National Forest

20°

4322 m · Summit temperature (est.) · Base temperature 70°

Half Dome

Yosemite National Park

28°

2694 m · Summit temperature (est.) · Base temperature 59°

Mount Washington

White Mountain National Forest

24°

1917 m · Summit temperature (est.) · Base temperature 46°

Mount Katahdin

Baxter State Park

40°

1606 m · Summit temperature (est.) · Base temperature 59°

Mount Mitchell

Mount Mitchell State Park

42°

2037 m · Summit temperature (est.) · Base temperature 65°

Clingmans Dome

Great Smoky Mountains

38°

2025 m · Summit temperature (est.) · Base temperature 62°

Mount Marcy

Adirondack Park

35°

1629 m · Summit temperature (est.) · Base temperature 54°

Mount Mansfield

Mount Mansfield State Forest

39°

1339 m · Summit temperature (est.) · Base temperature 55°

Whiteface Mountain

Adirondack Park

29°

1483 m · Summit temperature (est.) · Base temperature 46°

Camelback Mountain

Phoenix Mountains Preserve

82°

824 m · Summit temperature (est.) · Base temperature 92°

Mauna Kea

Hawaii

20°

4207 m · Summit temperature (est.) · Base temperature 69°

Haleakalā

Haleakalā National Park

29°

3055 m · Summit temperature (est.) · Base temperature 64°

Grouse Mountain

British Columbia

41°

1231 m · Summit temperature (est.) · Base temperature 56°

Sulphur Mountain

Banff National Park

21°

2451 m · Summit temperature (est.) · Base temperature 49°

Whistler Peak

British Columbia

22°

2181 m · Summit temperature (est.) · Base temperature 48°

Mont Tremblant

Parc national du Mont-Tremblant

48°

875 m · Summit temperature (est.) · Base temperature 59°

Data sources

Summit conditions are serious business

Summit temperatures are estimated from the valley forecast using the standard lapse rate (−6.5°C per 1,000 m); wind chill on an exposed ridge will feel far colder, and wind speeds are typically two to three times stronger than in the glen. Always check an official mountain forecast before heading up, carry a map and compass, and turn back if the cloud comes down.