Weather in Grantsburg, WI
Updated 2026-09-26 10:00 local time · ZIP codes 54840
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
61°14% rain63°11% rain64°10% rain61°11% rain60°10% rain59°11% rain59°11% rain
57°29% rain56°53% rain
56°29% rain58°23% rain
59°18% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 53% over the next 12 hours.
It feels like 52°F with winds near 14 mph.
60°F, 10% rain chance and 12 mph wind.
Visibility is around 6 mi; gusts may reach 25 mph.
Current temperature is 61°F, wind 14 mph, rain chance up to 53%.
UV index is 1.
Local weather characteristics in Grantsburg
Wisconsin has warm summers, cold winters and strong Great Lakes influence near Lakes Michigan and Superior. Lake-effect snow can be important in favored areas.
Grantsburg is part of the Midwest weather region. The forecast point is near 45.78°N latitude and 92.68°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Grantsburg weather today
Overcast and 61°F in Grantsburg, WI. Today's high is 64°F with a 57% rain chance. Winds are around 14 mph with gusts near 24 mph. Relative humidity is 57%, pressure is 30.14 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Grantsburg
Sunrise is at 07:02 AM and sunset is at 07:01 PM. Tomorrow's forecast calls for Overcast with a high near 68°F and a low near 57°F. The maximum rain chance is 21%.