Rock Falls, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock Falls, a city in Cerro Gordo County, Iowa.
Tonight
62°F
Showers And Thunderstorms Likely then Patchy Fog
Showers and thunderstorms likely before midnight, then patchy fog and showers and thunderstorms between midnight and 5am, then patchy fog and a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 62, with temperatures rising to around 65 overnight. East southeast wind 7 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Rock Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Showers And Thunderstorms Likely then Patchy Fog | 7 to 12 mph ESE | 75% |
| Saturday | 72°F | Patchy Fog | 6 to 9 mph NNE | 56% |
| Saturday Night | 56°F | Slight Chance Rain Showers | 8 to 12 mph NNE | 22% |
| Sunday | 65°F | Slight Chance Rain Showers | 14 mph NE | 15% |
| Sunday Night | 51°F | Cloudy then Slight Chance Rain Showers | 12 mph ENE | 23% |
| Monday | 60°F | Chance Rain Showers | 12 mph ENE | 47% |
| Monday Night | 46°F | Chance Rain Showers | 6 to 9 mph ENE | 45% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 8 mph ENE | 17% |
| Tuesday Night | 44°F | Partly Cloudy | 5 mph E | 2% |
| Wednesday | 64°F | Sunny | 5 mph ESE | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph SE | 5% |
| Thursday | 66°F | Slight Chance Rain Showers | 3 mph SSE | 16% |
| Thursday Night | 51°F | Partly Cloudy | 2 mph SSE | 9% |
| Friday | 67°F | Mostly Sunny | 1 to 6 mph ESE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Rock Falls (43.207, -93.087). Updated through the day.
Growing snapshot for Rock Falls
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5a
More local growing data for Rock Falls: nearby ZIP 50467 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mason City, Ia (7.2 mi from Rock Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.