Grundy Center, IA Weather & Growing Conditions
Today
79°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 79, with temperatures falling to around 75 in the afternoon. West wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Chance Showers And Thunderstorms | 9 mph W | 43% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 9 mph N | 76% |
| Wednesday | 74°F | Chance Showers And Thunderstorms then Partly Sunny | 5 mph NE | 39% |
| Wednesday Night | 54°F | Slight Chance Rain Showers | 3 mph NNE | 17% |
| Thursday | 79°F | Sunny | 2 mph ENE | 2% |
| Thursday Night | 59°F | Mostly Clear | 3 mph SSE | 0% |
| Friday | 82°F | Sunny | 2 to 8 mph S | 8% |
| Friday Night | 65°F | Mostly Clear | 7 mph S | 12% |
| Saturday | 86°F | Sunny | 5 to 8 mph S | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 9 to 13 mph SSW | 17% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph S | 17% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 9 mph SSE | 34% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 10 mph S | 34% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 8 to 13 mph E | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grundy Center, IA
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
160 days
Hardiness zone
5a
Explore more for Grundy Center, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Grundy Ctr, Ia (1.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.