Sigourney, IA Weather & Growing Conditions
Today
87°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 87, with temperatures falling to around 85 in the afternoon. West wind around 5 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph W | 35% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 82% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 mph NE | 80% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 55% |
| Thursday | 82°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 33% |
| Thursday Night | 60°F | Mostly Clear | 0 to 5 mph E | 3% |
| Friday | 85°F | Sunny | 0 to 5 mph SE | 6% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph S | 17% |
| Saturday | 89°F | Sunny then Slight Chance Rain Showers | 5 to 10 mph S | 15% |
| Saturday Night | 70°F | Slight Chance Rain Showers then Mostly Clear | 10 mph S | 15% |
| Sunday | 91°F | Mostly Sunny | 10 to 15 mph S | 11% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
| Monday | 91°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 30% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 30% |
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 Aug 4, 2026.