September weather forecastDenali National Park and Preserve, AK

Weather in September

September represents the shift to fall in Denali National Park and Preserve with a significant change in weather dynamics. A particular characteristic of September is the retreat of daylight hours to 12.9 from August’s high of 16.1. The descent in temperatures is noticeable, given the colder days and nights. The rainfall also drops to 1.8" (46mm), marking a decrease in precipitation as winter approaches. Weather in September is distinguished by shorter days, lower temperatures, and decreased rainfall.

Temperature

September is characterized by a reduction in the average high-temperature, from a fresh 53.6°F (12°C) in August to a frosty 42.8°F (6°C). Denali National Park and Preserve sees an average low-temperature of 26.6°F (-3°C) during September.

Rainfall

In September, in Denali National Park and Preserve, the rain falls for 15 days. Throughout September, 1.77" (45mm) of precipitation is 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

In Denali National Park and Preserve, the average length of the day in September is 12h and 56min.
On the first day of September, sunrise is at 6:53 am and sunset at 9:15 pm. On the last day of the month, sunrise is at 8:12 am and sunset at 7:36 pm AKDT.

Sunshine

In September, the average sunshine is 5h.

UV index

In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.