Harman US

Boulder Junction, WI Weather & Growing Conditions

This Afternoon
61°F
Slight Chance Rain Showers
A slight chance of rain showers after 2pm. Cloudy, with a high near 61. East wind around 6 mph. Chance of precipitation is 20%.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 61°F Slight Chance Rain Showers 6 mph E 17%
Tonight 48°F Patchy Fog then Mostly Cloudy 0 to 5 mph NE 9%
Sunday 62°F Mostly Cloudy 6 to 10 mph NE 0%
Sunday Night 40°F Mostly Cloudy 2 to 8 mph NE 0%
Monday 63°F Partly Sunny 2 to 6 mph E 0%
Monday Night 36°F Partly Cloudy then Patchy Fog 0 to 5 mph E 0%
Tuesday 65°F Patchy Frost then Sunny 0 to 6 mph E 0%
Tuesday Night 37°F Mostly Clear then Patchy Fog 0 to 3 mph E 0%
Wednesday 68°F Patchy Fog then Sunny 0 to 6 mph ESE 0%
Wednesday Night 40°F Mostly Clear then Patchy Fog 0 to 3 mph ENE 1%
Thursday 69°F Patchy Fog then Mostly Sunny 0 to 3 mph ENE 2%
Thursday Night 42°F Partly Cloudy 2 mph ENE 3%
Friday 71°F Mostly Sunny 0 to 3 mph SSE 3%
Friday Night 43°F Partly Cloudy 2 mph SSE 4%

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 Sep 19, 2026.