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

-60°

6190 m · Summit temperature (est.) · Base temperature 12°

Mount Rainier

Mount Rainier National Park

-10°

4392 m · Summit temperature (est.) · Base temperature 42°

Mount Whitney

Sequoia National Park

1°

4421 m · Summit temperature (est.) · Base temperature 52°

Mount Elbert

San Isabel National Forest

-26°

4401 m · Summit temperature (est.) · Base temperature 25°

Pikes Peak

Pike National Forest

-18°

4302 m · Summit temperature (est.) · Base temperature 33°

Longs Peak

Rocky Mountain National Park

-24°

4346 m · Summit temperature (est.) · Base temperature 27°

Grand Teton

Grand Teton National Park

-16°

4199 m · Summit temperature (est.) · Base temperature 33°

Mount Hood

Mount Hood National Forest

3°

3429 m · Summit temperature (est.) · Base temperature 43°

Mount Shasta

Shasta-Trinity National Forest

-6°

4322 m · Summit temperature (est.) · Base temperature 44°

Half Dome

Yosemite National Park

7°

2694 m · Summit temperature (est.) · Base temperature 39°

Mount Washington

White Mountain National Forest

8°

1917 m · Summit temperature (est.) · Base temperature 31°

Mount Katahdin

Baxter State Park

11°

1606 m · Summit temperature (est.) · Base temperature 30°

Mount Mitchell

Mount Mitchell State Park

24°

2037 m · Summit temperature (est.) · Base temperature 48°

Clingmans Dome

Great Smoky Mountains

26°

2025 m · Summit temperature (est.) · Base temperature 49°

Mount Marcy

Adirondack Park

14°

1629 m · Summit temperature (est.) · Base temperature 33°

Mount Mansfield

Mount Mansfield State Forest

18°

1339 m · Summit temperature (est.) · Base temperature 34°

Whiteface Mountain

Adirondack Park

16°

1483 m · Summit temperature (est.) · Base temperature 33°

Camelback Mountain

Phoenix Mountains Preserve

52°

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

Mauna Kea

Hawaii

5°

4207 m · Summit temperature (est.) · Base temperature 54°

Haleakalā

Haleakalā National Park

30°

3055 m · Summit temperature (est.) · Base temperature 66°

Grouse Mountain

British Columbia

40°

1231 m · Summit temperature (est.) · Base temperature 55°

Sulphur Mountain

Banff National Park

5°

2451 m · Summit temperature (est.) · Base temperature 34°

Whistler Peak

British Columbia

18°

2181 m · Summit temperature (est.) · Base temperature 44°

Mont Tremblant

Parc national du Mont-Tremblant

19°

875 m · Summit temperature (est.) · Base temperature 29°

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.