Koyukuk, AK Weather & Growing Conditions
Overnight
15°F
Mostly Clear
Mostly clear, with a low around 15. North wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 15°F | Mostly Clear | 10 mph N | 2% |
| Wednesday | 24°F | Mostly Sunny | 10 mph N | 6% |
| Wednesday Night | 20°F | Mostly Cloudy | 10 mph N | 11% |
| Thursday | 25°F | Partly Sunny | 5 to 10 mph N | 5% |
| Thursday Night | 18°F | Mostly Cloudy | 5 mph NW | 2% |
| Friday | 26°F | Partly Sunny then Slight Chance Light Snow | 5 mph N | 24% |
| Friday Night | 19°F | Slight Chance Light Snow | 5 mph N | 23% |
| Saturday | 25°F | Slight Chance Light Snow | 5 to 10 mph N | 23% |
| Saturday Night | 18°F | Chance Light Snow | 10 mph N | 28% |
| Sunday | 24°F | Chance Light Snow | 10 mph NE | 28% |
| Sunday Night | 16°F | Mostly Cloudy | 10 mph N | 13% |
| Monday | 22°F | Mostly Cloudy | 5 to 10 mph N | 12% |
| Monday Night | 14°F | Mostly Cloudy | 10 mph N | 11% |
| Tuesday | 20°F | Chance Light Snow | 5 to 10 mph N | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Koyukuk, AK
Last spring frost
May 18
First fall frost
Sep 8
Growing season
111 days
Explore more for Koyukuk, AK: full frost dates · planting calendar · Alaska frost dates
Climate data from the nearest NOAA station, Galena, Ak (26.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.