Plainfield, WI Weather & Growing Conditions
Today
81°F
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
A slight chance of rain showers between 10am and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 81, with temperatures falling to around 78 in the afternoon. Heat index values as high as 79. West southwest wind 7 to 13 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 | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 to 13 mph WSW | 27% |
| Tonight | 58°F | Chance Showers And Thunderstorms | 1 to 7 mph WNW | 38% |
| Wednesday | 78°F | Slight Chance Rain Showers | 1 to 5 mph W | 6% |
| Wednesday Night | 53°F | Slight Chance Rain Showers then Areas Of Fog | 0 to 5 mph WNW | 2% |
| Thursday | 82°F | Areas Of Fog then Sunny | 0 to 5 mph SW | 1% |
| Thursday Night | 57°F | Mostly Clear | 5 mph SSW | 0% |
| Friday | 86°F | Sunny | 2 to 12 mph SW | 2% |
| Friday Night | 62°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 17% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 10 mph SW | 37% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 37% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 2 to 10 mph S | 45% |
| Monday | 84°F | Chance Rain Showers | 2 to 8 mph SSW | 32% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 2 to 8 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plainfield, WI
Last spring frost
May 10
First fall frost
Oct 3
Growing season
146 days
Hardiness zone
4b
Explore more for Plainfield, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Hancock Exp Farm, Wi (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.