Riverton, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverton, a city in Fremont County, Wyoming.
Today
83°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 83. East northeast wind around 8 mph.
7-day forecast for Riverton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Areas Of Smoke | 8 mph ENE | 0% |
| Tonight | 52°F | Areas Of Smoke | 3 to 13 mph N | 2% |
| Wednesday | 90°F | Sunny | 2 to 6 mph ESE | 0% |
| Wednesday Night | 54°F | Mostly Clear | 3 to 8 mph WNW | 0% |
| Thursday | 95°F | Sunny | 2 to 6 mph NW | 0% |
| Thursday Night | 58°F | Clear | 3 to 7 mph WNW | 0% |
| Friday | 99°F | Sunny | 2 to 8 mph WNW | 0% |
| Friday Night | 60°F | Mostly Clear | 8 to 13 mph W | 0% |
| Saturday | 99°F | Sunny | 8 mph NW | 0% |
| Saturday Night | 60°F | Mostly Clear | 6 to 12 mph W | 0% |
| Sunday | 98°F | Sunny | 7 mph NNW | 4% |
| Sunday Night | 61°F | Partly Cloudy | 7 to 13 mph W | 2% |
| Monday | 97°F | Sunny | 7 mph E | 4% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 8 to 12 mph NNW | 11% |
Forecast source: National Weather Service (api.weather.gov) for Riverton (43.026, -108.381). Updated through the day.
Growing snapshot for Riverton
Last spring frost
May 12
First fall frost
Sep 24
Growing season
132 days
Hardiness zone
5a
More local growing data for Riverton: nearby ZIP 82501 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Arapahoe
Atlantic City
Boulder Flats
Crowheart
Dubois
Ethete
Fort Washakie
Hudson
Jeffrey City
Johnstown
Lander
Pavillion
Shoshoni
Climate data from the nearest NOAA station, Riverton, Wy (6.9 mi from Riverton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.