National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY
Updated: 3:32 am MDT Jun 22, 2026
 
Today

Today: Sunny, with a high near 71. Light and variable wind becoming west southwest 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 36. West wind 6 to 11 mph becoming light and variable after midnight.
Mostly Clear

 Tuesday

Tuesday: Sunny, with a high near 74. Calm wind becoming west around 6 mph in the afternoon.
Sunny

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 38. Light and variable wind.
Partly Cloudy

 Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. Calm wind becoming west around 6 mph in the afternoon.
Mostly Sunny
then Slight
Chance
T-storms
 Wednesday
Night
Wednesday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 38. Light and variable wind.
Slight Chance
T-storms then
Partly Cloudy
 Thursday

Thursday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Winds could gust as high as 22 mph.
Mostly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 40.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 75.
Mostly Sunny
Hi 71 °F Lo 36 °F Hi 74 °F Lo 38 °F Hi 74 °F Lo 38 °F Hi 74 °F Lo 40 °F Hi 75 °F

 

Today
 
 Sunny, with a high near 71. Light and variable wind becoming west southwest 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Tonight
 
 Mostly clear, with a low around 36. West wind 6 to 11 mph becoming light and variable after midnight.
Tuesday
 
 Sunny, with a high near 74. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 38. Light and variable wind.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
 
 A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 38. Light and variable wind.
Thursday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
 
 Partly cloudy, with a low around 40.
Friday
 
 Mostly sunny, with a high near 75.
Friday Night
 
 A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 40.
Saturday
 
 Showers likely and possibly a thunderstorm. Partly sunny, with a high near 58.
Saturday Night
 
 Rain and snow showers likely. Some thunder is also possible. Partly cloudy, with a low around 31.
Sunday
 
 Rain and snow showers likely. Some thunder is also possible. Snow level 8100 feet rising to 8700 feet in the afternoon. Partly sunny, with a high near 50.

 

Forecast from NOAA-NWS for Old Faithful WY.