Winfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winfield, a city in Henry County, Iowa.
Today
88°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Winfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Tonight | 67°F | Showers And Thunderstorms Likely | 5 mph NE | 57% |
| Wednesday | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NE | 81% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 5 mph N | 72% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph NE | 54% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph E | 6% |
| Friday | 84°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 15% |
| Saturday | 87°F | Sunny | 5 mph S | 13% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 10% |
| Sunday | 89°F | Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph S | 25% |
| Monday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 25% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 29% |
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 Aug 4, 2026.