National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY
Updated: 10:47 am MDT Jul 12, 2026
 
This
Afternoon
This Afternoon: Mostly sunny, with a steady temperature around 88. South southwest wind around 8 mph, with gusts as high as 23 mph.
Mostly Sunny

 Tonight

Tonight: Mostly cloudy, then gradually becoming clear, with a low around 49. Southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Decreasing
Clouds
 Monday

Monday: Sunny, with a high near 91. Calm wind becoming west southwest around 6 mph in the afternoon.
Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 49. Light and variable wind.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the afternoon.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 50. Light and variable wind.
Mostly Cloudy

 Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85. Calm wind becoming west southwest around 5 mph.
Mostly Sunny
then Chance
T-storms
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Chance
T-storms then
Partly Cloudy
 Thursday

Thursday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86.
Mostly Sunny
then Chance
T-storms
Hi 88 °F Lo 49 °F Hi 91 °F Lo 49 °F Hi 90 °F Lo 50 °F Hi 85 °F Lo 48 °F Hi 86 °F

 

This Afternoon
 
 Mostly sunny, with a steady temperature around 88. South southwest wind around 8 mph, with gusts as high as 23 mph.
Tonight
 
 Mostly cloudy, then gradually becoming clear, with a low around 49. Southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Monday
 
 Sunny, with a high near 91. Calm wind becoming west southwest around 6 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 49. Light and variable wind.
Tuesday
 
 Mostly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
 
 Mostly cloudy, with a low around 50. Light and variable wind.
Wednesday
 
 A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85. Calm wind becoming west southwest around 5 mph.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Thursday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Friday
 
 A chance of showers and thunderstorms. Sunny, with a high near 87.
Friday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Saturday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Old Faithful WY.