December weather forecastDenali National Park and Preserve, AK

Weather in December

December ushers in winter with its frigid climax in Denali National Park and Preserve. Matching the lowest UV index of the year with January, December also experiences the least amount of daylight, offering just 4.9 hours. While the temperatures continue to plummet, there is a minute increase in rainfall from the previous month. These extreme weather conditions define December and denote the arrival of quintessential Alaskan winter. The park embraces the chill as a regular part of its weather cycle, setting the stage for the new year.

Temperature

The arrival of December marks a slight shift to an average high-temperature of an extremely cold 6.8°F (-14°C) from November's 10.4°F (-12°C). Throughout December, Denali National Park and Preserve witnesses a nighttime temperature average of -9.4°F (-23°C).

Rainfall

In Denali National Park and Preserve, in December, during 12 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Denali National Park and Preserve, during the entire year, the rain falls for 145 days and collects up to 16.85" (428mm) of precipitation.

Daylight

With an average of 4h and 54min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 10:12 am and sunset at 3:36 pm. On the last day of the month, sunrise is at 10:41 am and sunset at 3:35 pm AKST.

Sunshine

January, November and December, with an average of 2h of sunshine, are months with the least sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 0. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a daily maximum UV index of 0 leads to the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.