Greenfield, IA Weather & Growing Conditions
This Afternoon
82°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 77 in the afternoon. West northwest wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Slight Chance Showers And Thunderstorms | 7 mph WNW | 23% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 7 to 10 mph N | 54% |
| Sunday | 65°F | Chance Showers And Thunderstorms | 9 to 13 mph NNE | 47% |
| Sunday Night | 56°F | Chance Showers And Thunderstorms | 12 mph NE | 52% |
| Monday | 60°F | Rain Showers Likely | 12 mph NE | 59% |
| Monday Night | 52°F | Chance Rain Showers | 7 to 10 mph NE | 48% |
| Tuesday | 59°F | Partly Sunny | 9 mph ENE | 10% |
| 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 | 9% |
| 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). Updated through the day.
Growing snapshot for Greenfield, IA
Last spring frost
Apr 25
First fall frost
Oct 12
Growing season
170 days
Hardiness zone
5b
Explore more for Greenfield, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Greenfield, Ia (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.