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

A notable decrease in the average high-temperature is observed during October, falling from a frosty 42.8°F (6°C) in September to a subzero cold 24.8°F (-4°C). In October, Denali National Park and Preserve records an average nighttime temperature of 10.4°F (-12°C).

Rainfall

In Denali National Park and Preserve, in October, during 13 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 145 rainfall days, and 16.85" (428mm) of precipitation is accumulated.

Daylight

In October, the average length of the day in Denali National Park and Preserve 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 in Denali National Park and Preserve is 3h.

UV index

The average daily maximum UV index in October in Denali National Park and Preserve is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 1 during October leads to these advisories:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. To guard against the harmful effects of the Sun, minimize exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.