National Weather Service Forecast for: Riverton WY
Issued by: National Weather Service Riverton, WY
Updated: 2:47 am MDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a low around 55. West southwest wind around 6 mph.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 94. Light and variable wind becoming west 6 to 11 mph in the afternoon.
Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 59. Northwest wind 5 to 10 mph becoming south southeast in the evening.
Partly Cloudy

 Friday

Friday: Increasing clouds, with a high near 96. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Increasing
Clouds

 Friday
Night
Friday Night: Mostly cloudy, with a low around 61. North wind 5 to 8 mph becoming light and variable after midnight.
Mostly Cloudy

 Saturday

Saturday: Partly sunny, with a high near 91. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Partly Sunny

 Saturday
Night
Saturday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59. Northwest wind 5 to 8 mph becoming southwest after midnight.
Slight Chance
T-storms then
Mostly Cloudy
 Sunday

Sunday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91.
Mostly Sunny
then Slight
Chance
T-storms
 Sunday
Night
Sunday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58.
Slight Chance
T-storms then
Partly Cloudy
Lo 55 °F Hi 94 °F Lo 59 °F Hi 96 °F Lo 61 °F Hi 91 °F Lo 59 °F Hi 91 °F Lo 58 °F

 

Overnight
 
 Mostly clear, with a low around 55. West southwest wind around 6 mph.
Thursday
 
 Sunny, with a high near 94. Light and variable wind becoming west 6 to 11 mph in the afternoon.
Thursday Night
 
 Partly cloudy, with a low around 59. Northwest wind 5 to 10 mph becoming south southeast in the evening.
Friday
 
 Increasing clouds, with a high near 96. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Friday Night
 
 Mostly cloudy, with a low around 61. North wind 5 to 8 mph becoming light and variable after midnight.
Saturday
 
 Partly sunny, with a high near 91. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59. Northwest wind 5 to 8 mph becoming southwest after midnight.
Sunday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91.
Sunday Night
 
 A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58.
Monday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88.
Monday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Tuesday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Wednesday
 
 Mostly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Riverton WY.