Greenfield, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenfield, a city in Milwaukee County, Wisconsin.
Overnight
61°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 61. East wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Greenfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Showers And Thunderstorms | 10 mph E | 100% |
| Saturday | 68°F | Showers And Thunderstorms | 5 to 15 mph SE | 100% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph NE | 79% |
| Sunday | 65°F | Scattered Rain Showers | 15 mph NE | 39% |
| Sunday Night | 54°F | Mostly Cloudy | 10 to 15 mph NE | 9% |
| Monday | 62°F | Mostly Cloudy | 15 mph NE | 7% |
| Monday Night | 51°F | Mostly Cloudy | 10 to 15 mph NE | 6% |
| Tuesday | 61°F | Partly Sunny | 10 to 15 mph NE | 8% |
| Tuesday Night | 51°F | Partly Cloudy | 5 to 15 mph NE | 7% |
| Wednesday | 62°F | Partly Sunny | 10 to 15 mph NE | 7% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NE | 4% |
| Thursday | 64°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph NE | 4% |
| Friday | 68°F | Mostly Sunny | 5 to 10 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Greenfield (42.961, -88.006). Updated through the day.
Growing snapshot for Greenfield
Last spring frost
May 3
First fall frost
Oct 14
Growing season
162 days
Hardiness zone
5b
More local growing data for Greenfield: nearby ZIP 53220 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Bayside
Brown Deer
Cudahy
Fox Point
Franklin
Glendale
Greendale
Hales Corners
Milwaukee
Oak Creek
River Hills
Shorewood
South Milwaukee
St. Francis
Wauwatosa
West Allis
West Milwaukee
Whitefish Bay
Climate data from the nearest NOAA station, Hales Corners/Whitnall Park/Bo, Wi (2.7 mi from Greenfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.