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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.