7-Day Zone Forecast for Upper Koyukuk Valley (Text-Only)
NWS Forecast for: Upper Koyukuk Valley
Issued by: National Weather Service Fairbanks, AK
Last Update: 345 PM AKST Wed Feb 25 2026
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Tonight: Mostly clear. Lows 33 to 39 below. Light winds.

Thursday: Mostly clear. Highs 13 to 19 below. Light winds.

Thursday Night: Mostly clear. Lows 29 to 41 below. Light winds.

Friday: Mostly clear. Highs 10 to 20 below. Light winds.

Friday Night: Mostly clear. Lows 31 to 43 below. Light winds.

Saturday: Partly cloudy. Highs around 20 below.

Saturday Night And Sunday: Mostly clear. Lows around 35 below. Highs around 15 below.

Sunday Night: Mostly clear. Lows around 30 below.

Monday And Monday Night: Partly cloudy. Highs around 10 below. Lows around 30 below.

Tuesday And Tuesday Night: Mostly clear. Highs around 5 below. Lows 25 to 30 below.

Wednesday: Sunny. Highs around zero.







Zone Forecast: Upper Koyukuk Valley

Visit your local NWS office at: https://www.weather.gov/Fairbanks