Greenfield, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenfield, a city in Milwaukee County, Wisconsin.
This Afternoon
71°F
Light Rain Likely
Rain before 3pm, then rain likely and a slight chance of thunderstorms. Cloudy. High near 71, with temperatures falling to around 66 in the afternoon. South wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Greenfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Light Rain Likely | 15 mph S | 95% |
| Tonight | 57°F | Light Rain | 10 to 15 mph S | 84% |
| Wednesday | 64°F | Light Rain | 10 to 15 mph S | 78% |
| Wednesday Night | 47°F | Chance Light Rain | 10 to 15 mph SW | 33% |
| Thursday | 55°F | Light Rain Likely | 10 to 15 mph W | 63% |
| Thursday Night | 43°F | Chance Light Rain | 5 mph NW | 37% |
| Friday | 52°F | Chance Light Rain | 10 to 15 mph N | 32% |
| Friday Night | 37°F | Mostly Cloudy | 5 to 10 mph N | 11% |
| Saturday | 51°F | Partly Sunny | 5 mph NW | 7% |
| Saturday Night | 36°F | Partly Cloudy then Slight Chance Light Rain | 0 to 5 mph W | 16% |
| Sunday | 54°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 17% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 10 mph W | 10% |
| Monday | 56°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 3% |
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 Nov 3, 2026.