Post Lake, WI Weather & Growing Conditions
Today
76°F
Slight Chance Showers And Thunderstorms then Mostly Cloudy
A slight chance of showers and thunderstorms before noon. Mostly cloudy, with a high near 76. Heat index values as high as 76. West wind 3 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 3 to 9 mph W | 18% |
| Tonight | 53°F | Mostly Cloudy then Patchy Fog | 0 to 3 mph NNW | 13% |
| Wednesday | 76°F | Patchy Fog then Partly Sunny | 0 to 3 mph NW | 12% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph W | 0% |
| Thursday | 80°F | Mostly Sunny | 0 to 6 mph SW | 0% |
| Thursday Night | 56°F | Mostly Clear | 5 mph SSW | 0% |
| Friday | 81°F | Sunny then Slight Chance Showers And Thunderstorms | 3 to 10 mph SW | 20% |
| Friday Night | 60°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 8 mph SW | 30% |
| Saturday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph WSW | 22% |
| Saturday Night | 60°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 6 mph WSW | 45% |
| Sunday | 81°F | Chance Showers And Thunderstorms | 2 to 7 mph W | 45% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 0 to 6 mph NW | 31% |
| Monday | 78°F | Patchy Fog then Chance Showers And Thunderstorms | 3 mph NW | 30% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 1 to 5 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Post Lake, WI
Last spring frost
May 19
First fall frost
Sep 29
Growing season
131 days
Hardiness zone
4b
Explore more for Post Lake, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Laona 6 Sw, Wi (14.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.