Rockwell City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rockwell City, a city in Calhoun County, Iowa.
This Afternoon
71°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 2pm. Mostly cloudy. High near 71, with temperatures falling to around 66 in the afternoon. North wind around 9 mph. Chance of precipitation is 20%.
7-day forecast for Rockwell City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Slight Chance Showers And Thunderstorms | 9 mph N | 19% |
| Tonight | 59°F | Cloudy | 9 mph NNE | 14% |
| Sunday | 66°F | Chance Drizzle | 12 mph NE | 38% |
| Sunday Night | 53°F | Rain Showers Likely | 8 mph ENE | 63% |
| Monday | 58°F | Showers And Thunderstorms | 8 mph NE | 83% |
| Monday Night | 49°F | Rain Showers Likely then Mostly Cloudy | 6 mph NE | 66% |
| Tuesday | 62°F | Partly Sunny | 5 mph NE | 7% |
| Tuesday Night | 45°F | Partly Cloudy | 2 mph E | 1% |
| Wednesday | 66°F | Mostly Sunny | 3 mph ESE | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 1 mph SE | 11% |
| Thursday | 68°F | Slight Chance Rain Showers | 3 mph SE | 19% |
| Thursday Night | 54°F | Mostly Cloudy | 1 mph SE | 11% |
| Friday | 70°F | Partly Sunny | 1 to 5 mph SE | 11% |
| Friday Night | 55°F | Mostly Cloudy | 2 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Rockwell City (42.398, -94.629). Updated through the day.
Growing snapshot for Rockwell City
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5a
More local growing data for Rockwell City: nearby ZIP 50579 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rockwell City, Ia (0.3 mi from Rockwell City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.