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Greenfield, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Greenfield, a city in Milwaukee County, Wisconsin.

Tonight
59°F
Showers And Thunderstorms
A chance of rain showers before 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 59. East wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

7-day forecast for Greenfield

WhenTempForecastWindPrecip
Tonight 59°F Showers And Thunderstorms 10 to 15 mph E 93%
Saturday 71°F Showers And Thunderstorms 10 to 15 mph SE 94%
Saturday Night 60°F Showers And Thunderstorms Likely 5 to 10 mph NE 74%
Sunday 66°F Chance Rain Showers 15 mph NE 51%
Sunday Night 54°F Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 26%
Monday 63°F Slight Chance Rain Showers 15 mph NE 16%
Monday Night 51°F Slight Chance Rain Showers 10 to 15 mph NE 16%
Tuesday 61°F Slight Chance Rain Showers 10 to 15 mph NE 16%
Tuesday Night 51°F Mostly Cloudy 5 to 10 mph NE 13%
Wednesday 63°F Partly Sunny 5 to 10 mph NE 13%
Wednesday Night 52°F Mostly Cloudy 5 to 10 mph N 7%
Thursday 66°F Partly Sunny 5 to 10 mph NE 3%
Thursday Night 52°F Mostly Cloudy 0 to 5 mph N 4%
Friday 68°F Mostly Sunny 5 mph NE 4%

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

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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.