Harrison, WI Weather & Growing Conditions
Today
81°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. Heat index values as high as 84. Southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 10 to 14 mph SW | 34% |
| Tonight | 64°F | Chance Showers And Thunderstorms | 5 to 9 mph W | 59% |
| Wednesday | 77°F | Chance Showers And Thunderstorms then Partly Sunny | 5 mph WSW | 44% |
| Wednesday Night | 60°F | Partly Cloudy | 5 mph WSW | 2% |
| Thursday | 80°F | Mostly Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 63°F | Mostly Clear | 7 mph SSW | 0% |
| Friday | 81°F | Sunny | 5 to 13 mph SSW | 2% |
| Friday Night | 67°F | Mostly Clear | 12 mph SSW | 10% |
| Saturday | 82°F | Mostly Sunny | 8 to 12 mph SW | 12% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 7 to 12 mph SSW | 39% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 10 mph WSW | 39% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 to 9 mph WSW | 47% |
| Monday | 80°F | Chance Rain Showers | 7 mph S | 35% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 8 mph NNE | 40% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harrison, WI
Last spring frost
May 4
First fall frost
Oct 6
Growing season
154 days
Hardiness zone
5b
Explore more for Harrison, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Appleton, Wi (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.