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Greenfield, IA Weather & Growing Conditions

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

Today
81°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 81, with temperatures falling to around 78 in the afternoon. West wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Greenfield

WhenTempForecastWindPrecip
Today 81°F Chance Showers And Thunderstorms 5 to 8 mph W 47%
Tonight 62°F Chance Showers And Thunderstorms 9 mph N 44%
Sunday 65°F Chance Showers And Thunderstorms 9 to 13 mph NNE 47%
Sunday Night 56°F Chance Showers And Thunderstorms 12 mph NE 51%
Monday 60°F Rain Showers Likely 12 mph NE 58%
Monday Night 52°F Chance Rain Showers 7 to 10 mph NE 49%
Tuesday 59°F Partly Sunny 9 mph ENE 9%
Tuesday Night 46°F Partly Cloudy 3 to 7 mph ENE 6%
Wednesday 63°F Mostly Sunny 5 mph E 2%
Wednesday Night 51°F Partly Cloudy 3 mph ESE 10%
Thursday 65°F Slight Chance Rain Showers 5 mph SE 24%
Thursday Night 56°F Mostly Cloudy then Slight Chance Rain Showers 3 mph ESE 17%
Friday 66°F Slight Chance Rain Showers then Partly Sunny 3 to 7 mph ESE 17%
Friday Night 57°F Mostly Cloudy 5 mph ESE 12%

Forecast source: National Weather Service (api.weather.gov) for Greenfield (41.306, -94.459). Updated through the day.

Growing snapshot for Greenfield

Last spring frost
Apr 25
First fall frost
Oct 12
Growing season
170 days
Hardiness zone
5b

More local growing data for Greenfield: nearby ZIP 50849 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Greenfield, Ia (2.1 mi from Greenfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.