Harman US

Mercer, WI Weather & Growing Conditions

Today
60°F
Chance Rain Showers
A chance of rain showers. Cloudy, with a high near 60. East wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 60°F Chance Rain Showers 5 mph E 28%
Tonight 45°F Slight Chance Rain Showers then Mostly Cloudy 0 to 5 mph NE 16%
Sunday 61°F Partly Sunny 5 to 10 mph NE 4%
Sunday Night 35°F Mostly Cloudy 5 to 10 mph NE 0%
Monday 60°F Partly Sunny 5 mph E 0%
Monday Night 36°F Partly Cloudy 0 to 5 mph E 0%
Tuesday 65°F Sunny 0 to 5 mph E 0%
Tuesday Night 35°F Mostly Clear 0 to 5 mph SE 0%
Wednesday 68°F Sunny 0 to 5 mph SE 0%
Wednesday Night 38°F Mostly Clear 0 to 5 mph SE 1%
Thursday 69°F Mostly Sunny 0 to 5 mph SE 2%
Thursday Night 40°F Partly Cloudy 0 mph 3%
Friday 71°F Mostly Sunny 0 to 5 mph S 3%
Friday Night 42°F Partly Cloudy 0 to 5 mph SE 4%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Mercer, WI

Last spring frost
May 25
First fall frost
Sep 21
Growing season
117 days
Hardiness zone
4a

Explore more for Mercer, WI: full frost dates · planting calendar · Wisconsin frost dates

Climate data from the nearest NOAA station, Rest Lake, Wi (12.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.