Mosinee, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mosinee, a city in Marathon County, Wisconsin.
Today
79°F
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Rain showers likely before 10am, then a chance of showers and thunderstorms between 10am and noon, then a slight chance of showers and thunderstorms between noon and 5pm. Mostly cloudy, with a high near 79. Heat index values as high as 79. West southwest wind 7 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mosinee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 12 mph WSW | 61% |
| Tonight | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 7 mph NW | 15% |
| Wednesday | 77°F | Mostly Sunny | 3 to 7 mph NW | 2% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 6 mph NNW | 1% |
| Thursday | 83°F | Sunny | 1 to 7 mph W | 0% |
| Thursday Night | 59°F | Mostly Clear | 6 mph SSW | 0% |
| Friday | 86°F | Sunny | 5 to 12 mph SW | 5% |
| Friday Night | 63°F | Slight Chance Rain Showers | 7 to 10 mph SW | 21% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 15% |
| Saturday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph W | 42% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 42% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 3 to 9 mph N | 38% |
| Monday | 82°F | Chance Showers And Thunderstorms | 3 to 9 mph S | 30% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 5 to 9 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Mosinee (44.792, -89.684). Updated through the day.
Growing snapshot for Mosinee
Last spring frost
May 6
First fall frost
Oct 4
Growing season
150 days
Hardiness zone
5a
More local growing data for Mosinee: nearby ZIP 54455 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Abbotsford
Athens
Colby
Edgar
Eland
Elderon
Fenwood
Hatley
Knowlton
Kronenwetter
Maine
Marathon City
Rib Mountain
Rothschild
Schofield
Stratford
Wausau
Weston
Climate data from the nearest NOAA station, Wausau Dwtn Ap, Wi (11.4 mi from Mosinee). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.