Greenfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenfield, a city in Adair County, Iowa.
Today
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 79 in the afternoon. North wind 6 to 9 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 | 82°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 46% |
| Tonight | 62°F | Showers And Thunderstorms | 7 to 12 mph NNE | 89% |
| Wednesday | 72°F | Showers And Thunderstorms Likely | 9 mph NE | 62% |
| Wednesday Night | 57°F | Slight Chance Rain Showers | 2 to 7 mph NE | 24% |
| Thursday | 80°F | Sunny | 3 mph E | 6% |
| Thursday Night | 62°F | Mostly Clear | 3 mph SE | 5% |
| Friday | 84°F | Sunny | 5 to 8 mph S | 5% |
| Friday Night | 67°F | Mostly Clear | 7 mph S | 9% |
| Saturday | 88°F | Sunny | 6 to 12 mph SSW | 4% |
| Saturday Night | 72°F | Mostly Clear | 10 to 15 mph S | 10% |
| Sunday | 89°F | Mostly Sunny | 14 mph S | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 14 mph S | 25% |
| Monday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 15 mph SSW | 25% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 12 to 16 mph SSE | 25% |
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 Aug 4, 2026.