Riverton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverton, a city in Fremont County, Iowa.
Today
84°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 7am and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 84. East northeast wind 2 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Riverton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Slight Chance Showers And Thunderstorms | 2 to 8 mph ENE | 32% |
| Tonight | 64°F | Chance Showers And Thunderstorms | 7 to 10 mph NNE | 81% |
| Wednesday | 75°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 9 mph NE | 82% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms then Mostly Clear | 1 to 7 mph NE | 29% |
| Thursday | 82°F | Mostly Sunny | 3 mph E | 3% |
| Thursday Night | 64°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 2 mph SE | 22% |
| Friday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 3 to 7 mph S | 22% |
| Friday Night | 69°F | Mostly Clear | 5 mph SSE | 5% |
| Saturday | 90°F | Sunny | 3 to 10 mph S | 2% |
| Saturday Night | 74°F | Mostly Clear | 13 mph S | 7% |
| Sunday | 92°F | Mostly Sunny | 12 mph S | 7% |
| Sunday Night | 73°F | Partly Cloudy | 14 mph SSE | 9% |
| Monday | 93°F | Mostly Sunny | 10 to 15 mph S | 7% |
| Monday Night | 74°F | Partly Cloudy | 10 to 15 mph SSE | 14% |
Forecast source: National Weather Service (api.weather.gov) for Riverton (40.687, -95.569). Updated through the day.
Growing snapshot for Riverton
Last spring frost
Apr 19
First fall frost
Oct 19
Growing season
182 days
Hardiness zone
5b
More local growing data for Riverton: nearby ZIP 51650 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Sidney 1Sse, Ia (6.3 mi from Riverton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.