Greenfield, WI Weather & Growing Conditions
Tonight
58°F
Light Rain
Rain. Cloudy, with a low around 58. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Light Rain | 10 to 15 mph S | 80% |
| Wednesday | 62°F | Chance Light Rain then Cloudy | 10 to 15 mph S | 51% |
| Wednesday Night | 47°F | Cloudy | 15 mph SW | 9% |
| Thursday | 54°F | Cloudy then Light Rain Likely | 10 to 15 mph W | 61% |
| Thursday Night | 40°F | Light Rain Likely | 5 to 10 mph NW | 56% |
| Friday | 50°F | Chance Light Rain | 10 to 15 mph N | 29% |
| Friday Night | 35°F | Mostly Cloudy | 5 to 10 mph N | 11% |
| Saturday | 52°F | Mostly Sunny | 5 mph W | 4% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 7% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 10 mph W | 7% |
| Monday | 59°F | Mostly Sunny | 5 to 15 mph W | 3% |
| Monday Night | 41°F | Partly Cloudy | 10 mph W | 2% |
| Tuesday | 59°F | Mostly Sunny | 10 mph NW | 0% |
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 (2.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.