Riverton, IA Weather & Growing Conditions
Tonight
70°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1am. Mostly cloudy. Low around 70, with temperatures rising to around 72 overnight. South wind 7 to 12 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 to 12 mph S | 41% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 7 mph WNW | 42% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 7 mph N | 46% |
| Sunday | 68°F | Chance Showers And Thunderstorms | 9 mph NNE | 50% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 8 mph NE | 50% |
| Monday | 62°F | Chance Rain Showers | 9 mph NE | 42% |
| Monday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 5 to 8 mph NNE | 39% |
| Tuesday | 62°F | Mostly Cloudy | 7 mph NE | 7% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 mph ENE | 4% |
| Wednesday | 65°F | Mostly Sunny | 3 mph ESE | 3% |
| Wednesday Night | 54°F | Mostly Cloudy | 2 mph ESE | 12% |
| Thursday | 66°F | Chance Rain Showers | 5 mph SE | 33% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 2 mph SE | 21% |
| Friday | 68°F | Slight Chance Rain Showers | 5 mph ESE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Riverton, IA
Last spring frost
Apr 19
First fall frost
Oct 19
Growing season
182 days
Hardiness zone
5b
Explore more for Riverton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sidney 1Sse, Ia (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.