Winfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winfield, a city in Henry County, Iowa.
Tonight
69°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy. Low around 69, with temperatures rising to around 71 overnight. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
7-day forecast for Winfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SE | 44% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 52% |
| Saturday Night | 65°F | Showers And Thunderstorms | 5 mph NW | 77% |
| Sunday | 73°F | Showers And Thunderstorms | 5 to 15 mph NE | 75% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 69% |
| Monday | 65°F | Rain Showers Likely | 15 mph NE | 64% |
| Monday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 59% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 44% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 69°F | Partly Sunny | 0 to 5 mph NE | 9% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Winfield (41.126, -91.438). Updated through the day.
Growing snapshot for Winfield
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5b
More local growing data for Winfield: nearby ZIP 52659 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbus Junction, Ia (10.7 mi from Winfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.