Rockwell City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rockwell City, a city in Calhoun County, Iowa.
Overnight
42°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 42, with temperatures rising to around 44 overnight. West northwest wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rockwell City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Chance Rain Showers | 15 mph WNW | 36% |
| Wednesday | 49°F | Chance Rain Showers | 12 to 15 mph WNW | 37% |
| Wednesday Night | 42°F | Chance Rain Showers | 10 mph WNW | 42% |
| Thursday | 51°F | Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 31% |
| Thursday Night | 36°F | Mostly Cloudy | 3 to 7 mph N | 0% |
| Friday | 49°F | Mostly Sunny | 0 to 3 mph N | 1% |
| Friday Night | 29°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 53°F | Mostly Sunny | 2 mph SSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 2 mph W | 0% |
| Sunday | 58°F | Sunny | 3 mph W | 0% |
| Sunday Night | 38°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 64°F | Sunny | 6 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 2 mph WNW | 0% |
| Tuesday | 62°F | Mostly Sunny | 2 mph NW | 0% |
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 Nov 4, 2026.