National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY
Updated: 6:47 pm MDT Jun 29, 2026
 
Tonight

Tonight: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers.  Mostly cloudy, with a low around 32. South wind 5 to 10 mph.  Chance of precipitation is 70%.
Showers
Likely then
Chance
Showers
Tuesday

Tuesday: Areas of frost before 8am.  Otherwise, partly sunny, with a high near 60. South southwest wind 6 to 10 mph.
Areas Frost
then Mostly
Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 32. Southwest wind 5 to 9 mph becoming calm  in the evening.
Mostly Clear

Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after noon.  Sunny, with a high near 65. Calm wind becoming southwest 5 to 8 mph in the morning. Winds could gust as high as 22 mph.
Sunny then
Slight Chance
T-storms
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 35. Southwest wind around 6 mph becoming calm  in the evening. Winds could gust as high as 21 mph.
Partly Cloudy

Thursday

Thursday: Mostly sunny, with a high near 68. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 24 mph.
Mostly Sunny

Thursday
Night
Thursday Night: A 10 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 38. Southwest wind around 5 mph becoming calm  after midnight.
Slight Chance
T-storms then
Mostly Cloudy
Friday

Friday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 69.
Partly Sunny
then Chance
T-storms
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 36.
Chance
T-storms then
Partly Cloudy
Lo 32 °F Hi 60 °F Lo 32 °F Hi 65 °F Lo 35 °F Hi 68 °F Lo 38 °F Hi 69 °F Lo 36 °F

 

Tonight
 
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 32. South wind 5 to 10 mph. Chance of precipitation is 70%.
Tuesday
 
Areas of frost before 8am. Otherwise, partly sunny, with a high near 60. South southwest wind 6 to 10 mph.
Tuesday Night
 
Mostly clear, with a low around 32. Southwest wind 5 to 9 mph becoming calm in the evening.
Wednesday
 
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 65. Calm wind becoming southwest 5 to 8 mph in the morning. Winds could gust as high as 22 mph.
Wednesday Night
 
Partly cloudy, with a low around 35. Southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 21 mph.
Thursday
 
Mostly sunny, with a high near 68. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 24 mph.
Thursday Night
 
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 38. Southwest wind around 5 mph becoming calm after midnight.
Friday
 
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 69.
Friday Night
 
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 36.
Independence Day
 
Sunny, with a high near 70.
Saturday Night
 
Clear, with a low around 38.
Sunday
 
Sunny, with a high near 76.
Sunday Night
 
Mostly clear, with a low around 42.
Monday
 
Sunny, with a high near 79.

 

Forecast from NOAA-NWS for Old Faithful WY.