Birnamwood, WI Weather & Growing Conditions
Today
79°F
Chance Rain Showers then Slight Chance Showers And Thunderstorms
A chance of rain showers between 9am and 1pm, then a slight chance of showers and thunderstorms between 1pm and 5pm. Mostly cloudy. High near 79, with temperatures falling to around 77 in the afternoon. Heat index values as high as 78. West southwest wind 7 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 to 12 mph WSW | 25% |
| Tonight | 55°F | Slight Chance Rain Showers | 3 to 7 mph NW | 16% |
| Wednesday | 77°F | Mostly Sunny | 1 to 5 mph ESE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 1 to 5 mph N | 2% |
| Thursday | 82°F | Sunny | 1 to 7 mph WSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 6 mph SW | 0% |
| Friday | 85°F | Sunny | 5 to 12 mph SW | 4% |
| Friday Night | 62°F | Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 22% |
| Saturday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 16% |
| Saturday Night | 62°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 to 9 mph WSW | 42% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 3 to 9 mph W | 42% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 2 to 8 mph NNW | 34% |
| Monday | 81°F | Chance Showers And Thunderstorms | 2 to 8 mph S | 29% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 3 to 8 mph NNW | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Birnamwood, WI
Last spring frost
May 14
First fall frost
Sep 30
Growing season
139 days
Hardiness zone
4b
Explore more for Birnamwood, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Antigo, Wi (14.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.