Shell Rock, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shell Rock, a city in Butler County, Iowa.
Tonight
59°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 59, with temperatures rising to around 61 overnight. North northeast wind 8 to 13 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Shell Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Chance Showers And Thunderstorms | 8 to 13 mph NNE | 34% |
| Sunday | 66°F | Chance Rain Showers then Chance Drizzle | 13 to 16 mph NE | 32% |
| Sunday Night | 52°F | Cloudy then Chance Rain Showers | 14 mph ENE | 45% |
| Monday | 60°F | Rain Showers Likely | 15 mph NE | 66% |
| Monday Night | 48°F | Rain Showers Likely | 8 to 13 mph NE | 66% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 10 mph ENE | 26% |
| Tuesday Night | 45°F | Partly Cloudy | 3 to 7 mph NE | 2% |
| Wednesday | 64°F | Mostly Sunny | 7 mph ENE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph E | 5% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph ESE | 17% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 3 mph ESE | 22% |
| Friday | 70°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 6 mph E | 15% |
| Friday Night | 55°F | Mostly Cloudy | 3 mph ESE | 8% |
| Saturday | 69°F | Slight Chance Rain Showers | 3 to 8 mph SE | 19% |
Forecast source: National Weather Service (api.weather.gov) for Shell Rock (42.712, -92.582). Updated through the day.
Growing snapshot for Shell Rock
Last spring frost
Apr 27
First fall frost
Oct 8
Growing season
165 days
Hardiness zone
5a
More local growing data for Shell Rock: nearby ZIP 50670 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Allison, Ia (10.8 mi from Shell Rock). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.