Sigourney, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sigourney, a city in Keokuk County, Iowa.
Overnight
48°F
Cloudy
Cloudy. Low around 48, with temperatures rising to around 50 overnight. West wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Sigourney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Cloudy | 10 mph W | 14% |
| Wednesday | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph W | 19% |
| Wednesday Night | 43°F | Mostly Cloudy | 10 to 15 mph W | 9% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph W | 59% |
| Thursday Night | 39°F | Mostly Cloudy | 5 to 10 mph N | 13% |
| Friday | 50°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 29°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 | 63°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Sigourney (41.334, -92.204). Updated through the day.
Growing snapshot for Sigourney
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
More local growing data for Sigourney: nearby ZIP 52591 weather · frost dates · planting calendar · Iowa frost dates
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Climate data from the nearest NOAA station, Sigourney, Ia (2.4 mi from Sigourney). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.