June marks the arrival of summer in
Denali National Park and Preserve. The most striking features of this month's weather is an impressive 20.2 daylight hours, illuminating the park for almost the entire day. High temperatures reach their apex, soaring to 54°F (12.2°C), making it the hottest month of the year. Despite extended hours of sunshine, an increase in rainfall is noted, hinting at the wilderness preparing for a different season ahead. Acknowledged for its distinctive weather conditions, June is a unique and awaited month in the park.
Temperature
The transition from
May to June in Denali National Park and Preserve brings a temperature rise, with average high-temperatures increasing from a frosty 42.8°F (6°C) to a fresh 53.6°F (12°C). During June, the temperature is averaged to a low of 33.8°F (1°C) at night.
Rainfall
In Denali National Park and Preserve, during June, the rain falls for 14 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, in Denali National Park and Preserve, there are 145 rainfall days, and 16.85" (428mm) of precipitation is accumulated.
Daylight
With an average of 20h and 12min of daylight, June has the longest days of the year in Denali National Park and Preserve.
On the first day of June in Denali National Park and Preserve, sunrise is at 4:13 am and sunset at 11:51 pm. On the last day of the month, sunrise is at 4:03 am and sunset at 12:13 am AKDT.
Sunshine
The months with the most sunshine in Denali National Park and Preserve are May and June, with an average of 9h of sunshine.
UV index
June and
July, with an average maximum UV index of 5, are months with the highest UV index in Denali National Park and Preserve. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In June, a daily UV index of 5 turns into the following recommendations:
Take precautions - Protection against sun damage is advised. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.