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NWS Forecast for Old Faithful WY

National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY

Updated: 10:30 pm MDT Jul 30, 2025

Overnight Mostly Clear	Thursday Sunny then Chance T-storms	Thursday Night Slight Chance T-storms then Mostly Clear	Friday Mostly Sunny then Chance Showers	Friday Night Slight Chance T-storms then Mostly Clear	Saturday Mostly Sunny then Chance Showers	Saturday Night Slight Chance T-storms then Partly Cloudy	Sunday Sunny then Slight Chance T-storms	Sunday Night Slight Chance T-storms then Partly Cloudy
Lo 41 °F	Hi 79 °F	Lo 40 °F	Hi 77 °F	Lo 39 °F	Hi 76 °F	Lo 38 °F	Hi 75 °F	Lo 39 °F

Hazardous Weather Outlook

Overnight	Mostly clear, with a low around 41. Light and variable wind.
Thursday	A 50 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 79. Light and variable wind becoming west 6 to 11 mph in the afternoon.
Thursday Night	A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 40. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Friday	A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 77. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Friday Night	A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly clear, with a low around 39. West southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday	A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night	A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 38. West southwest wind around 5 mph becoming calm after midnight.
Sunday	A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 75.
Sunday Night	A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39.
Monday	A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76.
Monday Night	A slight chance of showers and thunderstorms. Partly cloudy, with a low around 39.
Tuesday	Mostly sunny, with a high near 73.
Tuesday Night	Partly cloudy, with a low around 38.
Wednesday	Sunny, with a high near 76.

Forecast from NOAA-NWS for Old Faithful WY.

Forecast Discussion from: NOAA-NWS

Script developed by: El Dorado Weather

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