Kupreanof, AK Weather & Growing Conditions
Overnight
41°F
Heavy Rain
Rain. Cloudy, with a low around 41. Southeast wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Heavy Rain | 10 to 15 mph SE | 100% |
| Wednesday | 49°F | Heavy Rain Likely | 10 mph SE | 71% |
| Wednesday Night | 41°F | Light Rain | 10 mph SE | 98% |
| Thursday | 47°F | Rain | 15 to 20 mph SE | 100% |
| Thursday Night | 38°F | Rain | 20 mph SE | 100% |
| Friday | 47°F | Rain | 15 to 20 mph SE | 100% |
| Friday Night | 34°F | Light Rain | 10 to 15 mph SE | 100% |
| Saturday | 44°F | Light Rain | 10 mph E | 85% |
| Saturday Night | 34°F | Light Rain | 10 to 15 mph E | 100% |
| Sunday | 45°F | Light Rain | 15 mph SE | 100% |
| Sunday Night | 33°F | Light Rain | 15 mph SE | 78% |
| Monday | 46°F | Light Rain | 15 to 20 mph SE | 81% |
| Monday Night | 36°F | Light Rain | 15 to 20 mph SE | 100% |
| Tuesday | 46°F | Light Rain | 15 mph SE | 100% |
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 Nov 4, 2026.