Patchy fog is expected across northern Wisconsin and the lakeshore this morning. The fog will be locally dense, with visibilities around 1/4 mile or less. If you plan to travel this morning, be alert for rapidly changing visibilities. If you encounter dense fog, slow down and use your low beam headlights.
Local weather forecast
Weather in Mercer, WI
Updated 2026-09-26 10:00 local time · ZIP codes 54547
Now56°F
Cloudy
High / Low66° / 53°
Rain chance15%
Wind8 mph
Weather alerts
1Active alerts
Hourly
Next hours
Now56°12% rain
56°12% rain11 AM
60°11% rain
60°11% rain12 PM63°10% rain
63°10% rain1 PM64°10% rain
64°10% rain2 PM64°10% rain
64°10% rain3 PM66°9% rain
66°9% rain4 PM66°9% rain
66°9% rain5 PM64°10% rain
64°10% rain6 PM66°12% rain
66°12% rain7 PM
64°14% rain
64°14% rain8 PM62°16% rain
62°16% rain9 PM59°16% rain
59°16% rainForecast
3-day weather forecast
Today2026-09-26
66° 53°Overcast
Rain 15%Gust 10 mph
Tomorrow2026-09-27
62° 53°Overcast
Rain 20%Gust 5 mph
Monday2026-09-28
71° 56°Sunny
Rain 12%Gust 7 mph
Conditions
Weather details
Feels like50°F
Humidity57%
Pressure30.22 inHg
Visibility6 mi
Wind8 mph SSE
Wind gusts15 mph
Precipitation0.00 in
UV index2
Daylight
Sunrise, sunset and moon
Sunrise06:52 AM
Sunset06:50 PM
Moonrise06:36 PM
Moon phaseFull Moon
Next 24 hours
Key weather changes ahead
Warmest hour3 PM · 66°F
Coolest hour9 AM · 53°F
Highest rain chance3 AM · 24%
Strongest gusts12 AM · 20 mph
Practical guide
Weather insights for today
Umbrella not essential
Rain chance stays relatively low over the next 12 hours (up to 16%).
Light layers should work
It feels like 50°F with winds near 8 mph.
Best window: 3 PM
66°F, 9% rain chance and 10 mph wind.
Driving conditions look generally normal
Visibility is around 6 mi; gusts may reach 17 mph.
Good conditions for an easy run
Current temperature is 56°F, wind 8 mph, rain chance up to 16%.
Low UV protection needs
UV index is 2.
Local weather characteristics in Mercer
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.
Mercer is part of the Midwest weather region. The forecast point is near 46.17°N latitude and 90.06°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.
Mercer weather today
Cloudy and 56°F in Mercer, WI. Today's high is 66°F with a 15% rain chance. Winds are around 8 mph with gusts near 15 mph. Relative humidity is 57%, pressure is 30.22 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Mercer
Sunrise is at 06:52 AM and sunset is at 06:50 PM. Tomorrow's forecast calls for Overcast with a high near 62°F and a low near 53°F. The maximum rain chance is 20%.
Nearby
Weather near Mercer
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