Greenfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenfield, a city in Adair County, Iowa.
Overnight
43°F
Slight Chance Rain Showers
A slight chance of rain showers before 3am. Cloudy. Low around 43, with temperatures rising to around 45 overnight. West northwest wind around 15 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
7-day forecast for Greenfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Slight Chance Rain Showers | 15 mph WNW | 15% |
| Wednesday | 50°F | Cloudy | 15 to 18 mph W | 14% |
| Wednesday Night | 42°F | Cloudy then Chance Rain Showers | 14 mph W | 29% |
| Thursday | 52°F | Chance Rain Showers then Cloudy | 13 mph NW | 33% |
| Thursday Night | 39°F | Mostly Cloudy | 6 to 9 mph N | 8% |
| Friday | 50°F | Partly Sunny | 3 to 7 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 2 mph E | 0% |
| Saturday | 53°F | Mostly Sunny | 1 to 5 mph SW | 0% |
| Saturday Night | 36°F | Mostly Clear | 6 mph WSW | 0% |
| Sunday | 59°F | Sunny | 6 mph W | 0% |
| Sunday Night | 39°F | Clear | 7 mph SW | 0% |
| Monday | 64°F | Sunny | 7 to 12 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 5 mph NNW | 0% |
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 Nov 4, 2026.