Koyukuk, AK Weather & Growing Conditions
This Afternoon
46°F
Rain Showers
Rain showers. Cloudy, with a high near 46. Northwest wind around 5 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 46°F | Rain Showers | 5 mph NW | 75% |
| Tonight | 35°F | Rain Showers Likely | 5 to 10 mph NW | 67% |
| Sunday | 42°F | Mostly Cloudy | 5 to 10 mph NW | 2% |
| Sunday Night | 32°F | Mostly Cloudy | 5 to 10 mph NW | 1% |
| Monday | 42°F | Partly Sunny | 5 to 10 mph W | 2% |
| Monday Night | 32°F | Mostly Cloudy | 5 to 10 mph W | 6% |
| Tuesday | 46°F | Mostly Cloudy | 5 mph W | 2% |
| Tuesday Night | 33°F | Mostly Cloudy | 5 mph SW | 4% |
| Wednesday | 47°F | Mostly Cloudy | 5 mph S | 11% |
| Wednesday Night | 34°F | Slight Chance Rain And Snow Showers | 5 mph SE | 22% |
| Thursday | 48°F | Chance Rain And Snow Showers | 5 to 15 mph E | 51% |
| Thursday Night | 38°F | Rain Showers Likely | 10 to 15 mph E | 60% |
| Friday | 51°F | Rain Showers Likely | 10 mph E | 59% |
| Friday Night | 39°F | Chance Rain Showers | 5 to 10 mph E | 51% |
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 Sep 20, 2026.