Rockwell City, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rockwell City, a city in Calhoun County, Iowa.
Today
76°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 76, with temperatures falling to around 73 in the afternoon. North northwest wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Rockwell City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Showers And Thunderstorms Likely | 6 to 9 mph NNW | 71% |
| Tonight | 58°F | Showers And Thunderstorms Likely | 1 to 6 mph NNE | 55% |
| Wednesday | 75°F | Partly Sunny | 3 mph NE | 11% |
| Wednesday Night | 53°F | Mostly Clear | 1 mph SE | 2% |
| Thursday | 81°F | Sunny | 0 to 3 mph SSE | 1% |
| Thursday Night | 60°F | Mostly Clear | 5 mph SSE | 2% |
| Friday | 85°F | Sunny | 2 to 8 mph S | 6% |
| Friday Night | 65°F | Mostly Clear | 6 mph S | 13% |
| Saturday | 89°F | Sunny | 2 to 10 mph S | 10% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph SSE | 19% |
| Sunday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 9 mph SE | 19% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 8 mph SSE | 30% |
| Monday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 7 to 10 mph SE | 30% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph E | 31% |
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 Aug 4, 2026.