Shell Rock, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shell Rock, a city in Butler County, Iowa.
Overnight
64°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 1am, then patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 64, with temperatures rising to around 67 overnight. Southeast wind 9 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Shell Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Showers And Thunderstorms Likely | 9 to 13 mph SE | 77% |
| Saturday | 77°F | Patchy Fog | 9 mph WSW | 59% |
| Saturday Night | 58°F | Chance Showers And Thunderstorms | 9 to 13 mph N | 34% |
| Sunday | 66°F | Chance Rain Showers | 13 to 16 mph NE | 37% |
| Sunday Night | 53°F | Slight Chance Rain Showers | 12 to 15 mph ENE | 23% |
| Monday | 61°F | Chance Rain Showers | 15 mph ENE | 53% |
| Monday Night | 48°F | Chance Rain Showers | 8 to 14 mph NE | 53% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 10 mph ENE | 26% |
| Tuesday Night | 45°F | Partly Cloudy | 3 to 7 mph ENE | 3% |
| Wednesday | 65°F | Mostly Sunny | 6 mph ENE | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph ESE | 5% |
| Thursday | 67°F | Partly Sunny | 5 mph SE | 12% |
| Thursday Night | 52°F | Mostly Cloudy | 2 mph SE | 9% |
| Friday | 68°F | Mostly Sunny | 2 to 6 mph E | 6% |
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 19, 2026.