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

-7°

4392 m · Summit temperature (est.) · Base temperature 44°

Mount Whitney

Sequoia National Park

-5°

4421 m · Summit temperature (est.) · Base temperature 47°

Mount Elbert

San Isabel National Forest

-21°

4401 m · Summit temperature (est.) · Base temperature 30°

Pikes Peak

Pike National Forest

-9°

4302 m · Summit temperature (est.) · Base temperature 42°

Longs Peak

Rocky Mountain National Park

-9°

4346 m · Summit temperature (est.) · Base temperature 42°

Grand Teton

Grand Teton National Park

-15°

4199 m · Summit temperature (est.) · Base temperature 35°

Mount Hood

Mount Hood National Forest

4°

3429 m · Summit temperature (est.) · Base temperature 44°

Mount Shasta

Shasta-Trinity National Forest

-4°

4322 m · Summit temperature (est.) · Base temperature 46°

Half Dome

Yosemite National Park

20°

2694 m · Summit temperature (est.) · Base temperature 52°

Mount Washington

White Mountain National Forest

16°

1917 m · Summit temperature (est.) · Base temperature 39°

Mount Katahdin

Baxter State Park

21°

1606 m · Summit temperature (est.) · Base temperature 40°

Mount Mitchell

Mount Mitchell State Park

12°

2037 m · Summit temperature (est.) · Base temperature 35°

Clingmans Dome

Great Smoky Mountains

14°

2025 m · Summit temperature (est.) · Base temperature 37°

Mount Marcy

Adirondack Park

14°

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

Mount Mansfield

Mount Mansfield State Forest

19°

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

57°

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

Mauna Kea

Hawaii

4°

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

Haleakalā

Haleakalā National Park

24°

3055 m · Summit temperature (est.) · Base temperature 60°

Grouse Mountain

British Columbia

40°

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

Sulphur Mountain

Banff National Park

10°

2451 m · Summit temperature (est.) · Base temperature 38°

Whistler Peak

British Columbia

17°

2181 m · Summit temperature (est.) · Base temperature 43°

Mont Tremblant

Parc national du Mont-Tremblant

25°

875 m · Summit temperature (est.) · Base temperature 35°

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.