Weather in Merrimac, WI
Updated 2026-09-26 10:15 local time · ZIP codes 53561
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
57°20% rain60°15% rain62°13% rain64°12% rain64°11% rain65°11% rain65°11% rain63°14% rain63°18% rain
59°20% rain57°22% rain55°23% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 23%).
It feels like 52°F with winds near 8 mph.
65°F, 11% rain chance and 8 mph wind.
Visibility is around 6 mi; gusts may reach 12 mph.
Current temperature is 57°F, wind 8 mph, rain chance up to 23%.
UV index is 2.
Local weather characteristics in Merrimac
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.
Merrimac is part of the Midwest weather region. The forecast point is near 43.37°N latitude and 89.62°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.
Merrimac weather today
Overcast and 57°F in Merrimac, WI. Today's high is 65°F with a 16% rain chance. Winds are around 8 mph with gusts near 12 mph. Relative humidity is 73%, pressure is 30.23 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Merrimac
Sunrise is at 06:50 AM and sunset is at 06:49 PM. Tomorrow's forecast calls for Sunny with a high near 69°F and a low near 49°F. The maximum rain chance is 5%.