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Yellowstone National Park, CA Weather Forecast
Wx Discussion - Wx Hazards - Wx Aviation
NWS Forecast for Old Faithful WY
National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY
Updated: 11:32 pm MDT Jun 25, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 41. Calm wind.
Mostly Cloudy

 Friday

Friday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 73. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 25 mph.
Mostly Cloudy
then Chance
T-storms
 Friday
Night
Friday Night: A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 38. South wind 6 to 8 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Chance
Showers then
Showers
Likely
 Saturday

Saturday: Showers and possibly a thunderstorm. High near 55. South southwest wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Saturday
Night
Saturday Night: Rain showers before 9pm, then rain, possibly mixed with snow showers. Some thunder is also possible. Low around 31. South southwest wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Rain/Snow
then
Rain/Snow
Likely
 Sunday

Sunday: Rain likely, possibly mixed with snow showers. Some thunder is also possible. Snow level 8500 feet. Mostly cloudy, with a high near 49. Southwest wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Rain/Snow
Likely

 Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm. Snow level 8900 feet lowering to 8200 feet after midnight . Mostly cloudy, with a low around 28. South southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Showers
Likely

 Monday

Monday: Rain and snow showers likely before noon, then a chance of rain showers. Some thunder is also possible. Snow level 8000 feet rising to 9300 feet in the afternoon. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.
Rain/Snow
Likely then
Chance
T-storms
 Monday
Night
Monday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 30.
Slight Chance
T-storms then
Partly Cloudy
Lo 41 °F Hi 73 °F Lo 38 °F Hi 55 °F Lo 31 °F Hi 49 °F Lo 28 °F Hi 50 °F Lo 30 °F

 

Overnight
 
 Mostly cloudy, with a low around 41. Calm wind.
Friday
 
 A 30 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 73. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 25 mph.
Friday Night
 
 A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 38. South wind 6 to 8 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Saturday
 
 Showers and possibly a thunderstorm. High near 55. South southwest wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
 Rain showers before 9pm, then rain, possibly mixed with snow showers. Some thunder is also possible. Low around 31. South southwest wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Sunday
 
 Rain likely, possibly mixed with snow showers. Some thunder is also possible. Snow level 8500 feet. Mostly cloudy, with a high near 49. Southwest wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Sunday Night
 
 Showers likely and possibly a thunderstorm. Snow level 8900 feet lowering to 8200 feet after midnight . Mostly cloudy, with a low around 28. South southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Monday
 
 Rain and snow showers likely before noon, then a chance of rain showers. Some thunder is also possible. Snow level 8000 feet rising to 9300 feet in the afternoon. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.
Monday Night
 
 A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 30.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 61.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Mostly clear, with a low around 33.
Wednesday
 
 Sunny, with a high near 67.
Wednesday Night
 
 Mostly clear, with a low around 36.
Thursday
 
 Sunny, with a high near 73.

 

Forecast from NOAA-NWS for Old Faithful WY.

Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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