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

-51°

6190 m · Summit temperature (est.) · Base temperature -11°

Mount Rainier

Mount Rainier National Park

-22°

4392 m · Summit temperature (est.) · Base temperature 7°

Mount Whitney

Sequoia National Park

-21°

4421 m · Summit temperature (est.) · Base temperature 8°

Mount Elbert

San Isabel National Forest

-30°

4401 m · Summit temperature (est.) · Base temperature -1°

Pikes Peak

Pike National Forest

-23°

4302 m · Summit temperature (est.) · Base temperature 5°

Longs Peak

Rocky Mountain National Park

-23°

4346 m · Summit temperature (est.) · Base temperature 5°

Grand Teton

Grand Teton National Park

-26°

4199 m · Summit temperature (est.) · Base temperature 1°

Mount Hood

Mount Hood National Forest

-16°

3429 m · Summit temperature (est.) · Base temperature 7°

Mount Shasta

Shasta-Trinity National Forest

-20°

4322 m · Summit temperature (est.) · Base temperature 8°

Half Dome

Yosemite National Park

-7°

2694 m · Summit temperature (est.) · Base temperature 11°

Mount Washington

White Mountain National Forest

-10°

1917 m · Summit temperature (est.) · Base temperature 3°

Mount Katahdin

Baxter State Park

-7°

1606 m · Summit temperature (est.) · Base temperature 3°

Mount Mitchell

Mount Mitchell State Park

-12°

2037 m · Summit temperature (est.) · Base temperature 2°

Clingmans Dome

Great Smoky Mountains

-11°

2025 m · Summit temperature (est.) · Base temperature 3°

Mount Marcy

Adirondack Park

-11°

1629 m · Summit temperature (est.) · Base temperature 0°

Mount Mansfield

Mount Mansfield State Forest

-8°

1339 m · Summit temperature (est.) · Base temperature 1°

Whiteface Mountain

Adirondack Park

-10°

1483 m · Summit temperature (est.) · Base temperature 0°

Camelback Mountain

Phoenix Mountains Preserve

12°

824 m · Summit temperature (est.) · Base temperature 18°

Mauna Kea

Hawaii

-16°

4207 m · Summit temperature (est.) · Base temperature 12°

Haleakalā

Haleakalā National Park

-4°

3055 m · Summit temperature (est.) · Base temperature 16°

Grouse Mountain

British Columbia

2°

1231 m · Summit temperature (est.) · Base temperature 10°

Sulphur Mountain

Banff National Park

-14°

2451 m · Summit temperature (est.) · Base temperature 2°

Whistler Peak

British Columbia

-9°

2181 m · Summit temperature (est.) · Base temperature 5°

Mont Tremblant

Parc national du Mont-Tremblant

-4°

875 m · Summit temperature (est.) · Base temperature 1°

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.