Rock Valley, IA Weather & Growing Conditions
Today
72°F
Patchy Smoke
Patchy smoke and a slight chance of showers and thunderstorms before 9am, then a chance of rain showers and patchy smoke between 9am and 10am, then patchy smoke and a chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North northwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Smoke | 5 to 10 mph NNW | 47% |
| Tonight | 53°F | Chance Rain Showers then Mostly Cloudy | 0 mph | 27% |
| Wednesday | 76°F | Mostly Sunny | 0 mph | 1% |
| Wednesday Night | 54°F | Mostly Clear | 0 mph | 0% |
| Thursday | 82°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Thursday Night | 62°F | Mostly Clear | 5 to 10 mph S | 3% |
| Friday | 86°F | Sunny | 5 to 10 mph S | 5% |
| Friday Night | 65°F | Mostly Clear | 5 to 10 mph S | 12% |
| Saturday | 89°F | Sunny | 5 to 15 mph S | 5% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SE | 22% |
| Sunday | 88°F | Mostly Sunny | 10 mph SE | 13% |
| Sunday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph E | 22% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph E | 22% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 20% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock Valley, IA
Last spring frost
Apr 30
First fall frost
Oct 3
Growing season
154 days
Hardiness zone
5a
Explore more for Rock Valley, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sioux Ctr 2 Se, Ia (13.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.