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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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 20, 2026.