Shellsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shellsburg, a city in Benton County, Iowa.
This Afternoon
69°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 66 in the afternoon. Southeast wind 10 to 15 mph. Chance of precipitation is 90%.
7-day forecast for Shellsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 10 to 15 mph SE | 89% |
| Tonight | 49°F | Showers And Thunderstorms Likely | 10 mph S | 65% |
| Wednesday | 54°F | Chance Rain Showers | 10 to 15 mph SW | 38% |
| Wednesday Night | 44°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SW | 33% |
| Thursday | 53°F | Rain Showers Likely | 10 mph W | 65% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 18% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 3% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
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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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 Nov 4, 2026.