Boulder Junction, WI Weather & Growing Conditions
Tonight
56°F
Rain Showers
Rain showers and widespread fog. Cloudy. Low around 56, with temperatures rising to around 58 overnight. Southeast wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Rain Showers | 6 mph SE | 89% |
| Wednesday | 61°F | Rain Showers | 7 mph SSE | 91% |
| Wednesday Night | 40°F | Rain Showers | 8 mph W | 93% |
| Thursday | 45°F | Rain Showers | 9 to 15 mph N | 96% |
| Thursday Night | 28°F | Chance Rain And Snow Showers then Cloudy | 9 to 14 mph NNE | 25% |
| Friday | 41°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Friday Night | 25°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 46°F | Mostly Sunny | 0 to 6 mph WSW | 1% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph WSW | 13% |
| Sunday | 50°F | Slight Chance Rain Showers | 5 to 9 mph WNW | 17% |
| Sunday Night | 32°F | Partly Cloudy | 2 to 6 mph WSW | 11% |
| Monday | 52°F | Partly Sunny | 5 to 10 mph SW | 4% |
| Monday Night | 34°F | Partly Cloudy | 8 mph W | 3% |
| Tuesday | 49°F | Mostly Sunny | 6 to 9 mph WNW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Boulder Junction, WI
Last spring frost
May 25
First fall frost
Sep 21
Growing season
117 days
Hardiness zone
4a
Explore more for Boulder Junction, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Rest Lake, Wi (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.