Winfield, IA Weather & Growing Conditions
Overnight
69°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 1am and 4am, then patchy fog and a chance of showers and thunderstorms. Partly cloudy, with a low around 69. South wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 29% |
| Saturday | 85°F | Patchy Fog | 5 to 10 mph S | 50% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph W | 72% |
| Sunday | 72°F | Showers And Thunderstorms | 10 to 15 mph NE | 76% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 63% |
| Monday | 64°F | Showers And Thunderstorms Likely | 15 mph NE | 63% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Tuesday Night | 48°F | Mostly Clear | 5 to 10 mph NE | 5% |
| Wednesday | 67°F | Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 69°F | Partly Sunny | 5 mph NE | 6% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 5 mph E | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winfield, IA
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5b
Explore more for Winfield, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Columbus Junction, Ia (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.