Riverton, WY Weather & Growing Conditions
Tonight
32°F
Partly Cloudy
Partly cloudy, with a low around 32. South southeast wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Partly Cloudy | 6 mph SSE | 0% |
| Wednesday | 50°F | Patchy Fog then Mostly Cloudy | 3 mph WNW | 0% |
| Wednesday Night | 28°F | Partly Cloudy | 0 to 5 mph SSW | 0% |
| Thursday | 53°F | Mostly Sunny | 5 mph SW | 0% |
| Thursday Night | 31°F | Partly Cloudy | 2 to 6 mph SW | 3% |
| Friday | 52°F | Sunny | 1 to 6 mph SW | 3% |
| Friday Night | 30°F | Mostly Clear | 2 to 6 mph SSW | 1% |
| Saturday | 55°F | Sunny | 2 to 6 mph S | 0% |
| Saturday Night | 31°F | Mostly Clear | 2 to 7 mph S | 0% |
| Sunday | 61°F | Sunny | 7 mph SSW | 0% |
| Sunday Night | 35°F | Partly Cloudy | 7 mph SSW | 0% |
| Monday | 59°F | Mostly Sunny | 7 mph W | 0% |
| Monday Night | 35°F | Partly Cloudy | 6 mph WSW | 0% |
| Tuesday | 60°F | Mostly Sunny | 6 mph WSW | 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 Nov 4, 2026.