Riverton, WY Weather & Growing Conditions
Overnight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Cloudy | 6 mph SW | 8% |
| Saturday | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 9 mph NNW | 29% |
| Saturday Night | 45°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 6 to 13 mph NNW | 80% |
| Sunday | 64°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph NNW | 26% |
| Sunday Night | 44°F | Partly Cloudy | 2 to 6 mph ESE | 6% |
| Monday | 70°F | Sunny | 5 mph S | 0% |
| Monday Night | 45°F | Mostly Clear | 6 mph S | 0% |
| Tuesday | 75°F | Mostly Sunny | 6 mph NE | 1% |
| Tuesday Night | 49°F | Chance Showers And Thunderstorms | 6 mph W | 34% |
| Wednesday | 77°F | Mostly Sunny | 6 mph SW | 9% |
| Wednesday Night | 48°F | Mostly Clear | 6 mph SSW | 3% |
| Thursday | 80°F | Sunny | 6 mph WNW | 1% |
| Thursday Night | 50°F | Mostly Clear | 7 mph SE | 1% |
| Friday | 81°F | Mostly Sunny | 6 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Riverton, WY
Last spring frost
May 12
First fall frost
Sep 24
Growing season
132 days
Hardiness zone
5a
Explore more for Riverton, WY: full frost dates · planting calendar · Wyoming frost dates
Climate data from the nearest NOAA station, Riverton, Wy (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.