October weather forecast
Denali National Park and Preserve, AK

By October, the fall season has a firm grip in Denali National Park and Preserve. An evident departure from warmer months, October exhibits cooler temperatures and shrinking daylight hours. The decrease in sunlight, from around 15 hours in summer to just under 10, is a clear indicator of the seasonal transition. Although the park experiences a decrease in UV index, it also sees a small increase in rainfall. Yet, the unmistakable chill in the air marks October as a month of change.

Temperature

Denali National Park and Preserve experiences a clear temperature downturn in October, with average high-temperatures moving from a frosty 42.8°F (6°C) in September to a subzero cold 24.8°F (-4°C). Denali National Park and Preserve records an average temperature drop to an extreme cold 10.4°F (-12°C) in October.

Rainfall

In Denali National Park and Preserve, in October, it is raining for 13 days, with typically 0.79" (20mm) of accumulated precipitation. 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 October, the average length of the day is 9h and 48min.
On the first day of the month, sunrise is at 8:15 am and sunset at 7:32 pm. On the last day of October, in Denali National Park and Preserve, sunrise is at 9:41 am and sunset at 5:54 pm AKDT.

Sunshine

The average sunshine in October is 3h.

UV index

The average daily maximum UV index in October in Denali National Park and Preserve is 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 1 during October translates into these guidelines:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.