Sigourney, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sigourney, a city in Keokuk County, Iowa.
Today
86°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 86, with temperatures falling to around 84 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
7-day forecast for Sigourney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 35% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 83% |
| Wednesday | 77°F | Showers And Thunderstorms | 5 mph NE | 80% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 53% |
| Thursday | 81°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 32% |
| Thursday Night | 60°F | Mostly Clear | 0 to 5 mph E | 3% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 17% |
| Saturday | 88°F | Sunny then Slight Chance Rain Showers | 5 to 10 mph S | 15% |
| Saturday Night | 71°F | Slight Chance Rain Showers then Mostly Clear | 10 mph S | 15% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph S | 11% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
| Monday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 30% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 30% |
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 Aug 4, 2026.