Kupreanof, AK Weather & Growing Conditions
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. Northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 10 mph NW | 1% |
| Tuesday | 68°F | Partly Sunny | 10 mph NW | 1% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NW | 0% |
| Wednesday | 71°F | Mostly Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NW | 0% |
| Thursday | 73°F | Partly Sunny | 5 mph NW | 3% |
| Thursday Night | 53°F | Mostly Cloudy | 0 to 5 mph NW | 9% |
| Friday | 72°F | Mostly Cloudy | 0 mph | 12% |
| Friday Night | 54°F | Slight Chance Rain Showers | 0 mph | 16% |
| Saturday | 70°F | Slight Chance Rain Showers | 0 mph | 20% |
| Saturday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 0 mph | 20% |
| Sunday | 71°F | Partly Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 53°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Monday | 73°F | Partly Sunny | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Kupreanof, AK
Last spring frost
Apr 29
First fall frost
Oct 17
Growing season
169 days
Explore more for Kupreanof, AK: full frost dates · planting calendar · Alaska frost dates
Climate data from the nearest NOAA station, Petersburg 1, Ak (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.