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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.

This Afternoon
85°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Partly sunny. High near 85, with temperatures falling to around 79 in the afternoon. West northwest wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Greenfield

WhenTempForecastWindPrecip
This Afternoon 85°F Slight Chance Showers And Thunderstorms 8 mph WNW 22%
Tonight 61°F Chance Showers And Thunderstorms 7 to 10 mph N 59%
Sunday 64°F Chance Rain Showers 9 to 13 mph NNE 44%
Sunday Night 56°F Rain Showers Likely 12 mph NE 64%
Monday 58°F Rain Showers 12 mph NE 80%
Monday Night 51°F Rain Showers 7 to 10 mph NNE 79%
Tuesday 59°F Mostly Cloudy 8 mph NE 8%
Tuesday Night 46°F Partly Cloudy 6 mph ENE 1%
Wednesday 62°F Mostly Sunny 6 mph E 0%
Wednesday Night 52°F Mostly Cloudy 5 mph ESE 11%
Thursday 65°F Chance Rain Showers 5 mph SE 33%
Thursday Night 57°F Chance Rain Showers 3 mph SE 29%
Friday 68°F Slight Chance Rain Showers 2 to 6 mph ESE 20%
Friday Night 59°F Mostly Cloudy then Slight Chance Rain Showers 5 mph ESE 21%

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 20, 2026.