National Weather Service Forecast for: Green River WY
Issued by: National Weather Service Riverton, WY
Updated: 12:47 am MDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a low around 55. Light and variable wind.
Mostly Clear

 Thursday

Thursday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Increasing clouds, with a high near 94. Light and variable wind becoming southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny then
Chance
Showers
 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 57. South southwest wind 6 to 11 mph becoming light and variable after midnight.
Slight Chance
T-storms then
Partly Cloudy
 Friday

Friday: Increasing clouds, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.
Increasing
Clouds

 Friday
Night
Friday Night: Mostly cloudy, with a low around 61. West wind around 6 mph becoming calm after midnight.
Mostly Cloudy

 Saturday

Saturday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Mostly Cloudy
then Chance
T-storms
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Chance
Showers

 Sunday

Sunday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86.
Mostly Sunny
then Slight
Chance
T-storms
 Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Chance
Showers then
Mostly Cloudy
Lo 55 °F Hi 94 °F Lo 57 °F Hi 96 °F Lo 61 °F Hi 89 °F Lo 55 °F Hi 86 °F Lo 54 °F

 

Overnight
 
 Mostly clear, with a low around 55. Light and variable wind.
Thursday
 
 A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Increasing clouds, with a high near 94. Light and variable wind becoming southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 57. South southwest wind 6 to 11 mph becoming light and variable after midnight.
Friday
 
 Increasing clouds, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
 Mostly cloudy, with a low around 61. West wind around 6 mph becoming calm after midnight.
Saturday
 
 A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Sunday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Monday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85.
Monday Night
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Tuesday
 
 Mostly sunny, with a high near 85.
Tuesday Night
 
 Partly cloudy, with a low around 53.
Wednesday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Green River WY.