Greenfield, WI Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SW | 4% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 81% |
| Wednesday | 75°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph NW | 79% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 49% |
| Thursday | 78°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph NE | 26% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph S | 12% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 63°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 51% |
| Monday | 83°F | Chance Rain Showers | 5 to 10 mph S | 45% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 44% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Greenfield, WI
Last spring frost
May 3
First fall frost
Oct 14
Growing season
162 days
Hardiness zone
5b
Explore more for Greenfield, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Hales Corners/Whitnall Park/Bo, Wi (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.