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Denali National Park and Preserve Moose Antlers
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Denali National Park and Preserve
Weather
Typical summer weather in Denali
nps photo / kent miller
Mountains form their own weather, with sudden showers emerging in some valleys while others remain dry or even sunny. Prepare for extremely variable weather.
 

Current forecast

Weather in Denali is extremely variable. Changes in weather often occur without warning. Many of our rangers tell visitors to expect sun, wind, rain, and clouds, and expect them all on the same day.

Summer

When talking about weather, "summer" means late May through early September.

Average summer temperatures range from 33 to 75 degrees Fahrenheit. While rare, it has been known to snow in July, so be prepared for cold weather. Wearing layers of clothing makes it easy to regulate your body temperature.

Also, you'll find that a good waterproof, hooded raincoat is invaluable. June through August are the rainiest months in Denali, although yearly variances sometimes lead to bone dry summers - Denali always keeps you guessing.

Winter

Winters can be extremely cold with temperatures ranging from -40 degrees Fahrenheit and colder, to high 20s on warm days. This kind of extreme cold typically begins by late October or early November, and runs through March.

As mentioned above, snow is possible any month of the year - although snow that falls before mid-September tends to melt quickly. Winter snow levels are not usually sufficient for skiing or other recreation until mid-October or later.

Specialized cold weather gear is necessary for mountaineering and winter visits.

Spring and fall

Both seasons are quite short. Spring weather, in April and early May, sees highs into the 40s or 50s F, and lows near or below freezing.

Fall weather, in September, is similar - highs well above freezing, and lows at or below freezing.

 
Rainy days often yield their own particular style of beauty in Denali
NPS photo / kent miller
Though rain is common in summer, there is a silver - or multi-hued - lining.
 

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Moose may appreciate an increase in woody vegetation

Did You Know?
Warmer average temperatures over several decades have resulted in expansion of woody vegetation. If this warming trend continues, it will change Alaska's ecosystems and drastically alter the physical appearance of Denali's landscape, as treeline marches higher up the mountains.

Last Updated: April 13, 2011 at 16:35 MST