Shellsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shellsburg, a city in Benton County, Iowa.
Overnight
63°F
Partly Cloudy
Partly cloudy, with a low around 63. South wind around 5 mph.
7-day forecast for Shellsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 5 mph S | 0% |
| Tuesday | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 28% |
| Tuesday Night | 63°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 80% |
| Wednesday | 75°F | Chance Showers And Thunderstorms | 5 mph N | 55% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 30% |
| Thursday | 80°F | Slight Chance Rain Showers then Sunny | 0 to 5 mph NE | 16% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 1% |
| Friday | 83°F | Sunny | 0 to 5 mph SE | 3% |
| Friday Night | 64°F | Mostly Clear | 5 mph S | 12% |
| Saturday | 86°F | Sunny | 5 mph S | 9% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 18% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph S | 18% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 39% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 39% |
Forecast source: National Weather Service (api.weather.gov) for Shellsburg (42.093, -91.871). Updated through the day.
Growing snapshot for Shellsburg
Last spring frost
May 3
First fall frost
Oct 3
Growing season
151 days
Hardiness zone
5a
More local growing data for Shellsburg: nearby ZIP 52332 weather · frost dates · planting calendar · Iowa frost dates
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Urbana
Van Horne
Vinton
Walford
Watkins
Climate data from the nearest NOAA station, Vinton, Ia (7.9 mi from Shellsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.