Sigourney, IA Weather & Growing Conditions
Overnight
48°F
Cloudy
Cloudy. Low around 48, with temperatures rising to around 51 overnight. West wind around 10 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Cloudy | 10 mph W | 13% |
| Wednesday | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph W | 18% |
| Wednesday Night | 44°F | Mostly Cloudy | 10 to 15 mph W | 9% |
| Thursday | 55°F | Rain Showers Likely | 10 to 15 mph W | 58% |
| Thursday Night | 40°F | Mostly Cloudy | 5 to 10 mph N | 13% |
| Friday | 50°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 58°F | Sunny | 5 mph W | 1% |
| Sunday Night | 35°F | Clear | 5 mph SW | 0% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sigourney, IA
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
Explore more for Sigourney, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sigourney, Ia (2.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.