Winterset, IA Weather & Growing Conditions
Overnight
44°F
Slight Chance Rain Showers
A slight chance of rain showers after 5am. Cloudy. Low around 44, with temperatures rising to around 46 overnight. West northwest wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Slight Chance Rain Showers | 14 mph WNW | 15% |
| Wednesday | 51°F | Slight Chance Rain Showers then Cloudy | 14 to 17 mph W | 15% |
| Wednesday Night | 43°F | Mostly Cloudy then Chance Rain Showers | 13 mph W | 29% |
| Thursday | 52°F | Chance Rain Showers then Cloudy | 13 mph NW | 34% |
| Thursday Night | 40°F | Mostly Cloudy | 6 to 9 mph N | 8% |
| Friday | 50°F | Partly Sunny | 3 to 7 mph N | 5% |
| Friday Night | 30°F | Partly Cloudy | 3 mph ENE | 0% |
| Saturday | 53°F | Mostly Sunny | 3 mph SW | 0% |
| Saturday Night | 36°F | Mostly Clear | 6 mph WSW | 0% |
| Sunday | 60°F | Sunny | 6 mph W | 0% |
| Sunday Night | 39°F | Clear | 6 mph SW | 0% |
| Monday | 65°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 7 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winterset, IA
Last spring frost
Apr 30
First fall frost
Oct 3
Growing season
157 days
Hardiness zone
5b
Explore more for Winterset, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Winterset 1S, Ia (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.