Yellowstone National Park Forecast

FPUS55 KRIW 221449

ZFPRIW



Zone Forecast Product for Western and Central Wyoming

National Weather Service Riverton WY

847 AM MDT Wed Jul 22 2026



WYZ020-222200-

Natrona County Lower Elevations-

WYZ001-222200-

Yellowstone National Park-

Including the cities of Lake, Mammoth, and Old Faithful

847 AM MDT Wed Jul 22 2026



...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...



.TODAY...Partly cloudy this morning, then mostly cloudy with

showers and numerous thunderstorms this afternoon. Patchy smoke

this afternoon. Some thunderstorms may produce heavy rainfall

this afternoon. Highs in the mid 70s. West winds around 10 mph

with gusts up to 20 mph this afternoon. Chance of rain

80 percent. 

.TONIGHT...Mostly cloudy. Showers and scattered thunderstorms in

the evening, then scattered showers with isolated thunderstorms

after midnight. Some thunderstorms may produce heavy rainfall.

Lows around 50. Northeast winds around 10 mph in the evening.

Chance of rain 80 percent. 

.THURSDAY...Partly cloudy with scattered showers. Isolated

thunderstorms in the morning, then scattered thunderstorms in the

afternoon. Patchy smoke. Some thunderstorms may produce heavy

rainfall in the morning. Some thunderstorms may produce heavy

rainfall in the afternoon. Highs in the mid 70s. West winds

around 10 mph in the afternoon. Chance of rain 30 percent. 

.THURSDAY NIGHT...Partly cloudy in the evening, then clearing.

Lows in the lower 50s. 

.FRIDAY...Sunny. Highs around 80. Southwest winds around 10 mph,

becoming west in the afternoon. Gusts up to 30 mph. 

.FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows

in the lower 50s. 

.SATURDAY...Mostly sunny. A chance of showers and thunderstorms

in the afternoon. Highs around 80. Chance of rain 30 percent. 

.SATURDAY NIGHT...Partly cloudy in the evening, then clearing.

Lows in the lower 50s. 

.SUNDAY...Sunny. A slight chance of. Highs around 80. 

.SUNDAY NIGHT...Mostly clear. Lows in the lower 50s. 

.MONDAY...Mostly sunny. A slight chance of showers and

thunderstorms in the afternoon. Highs around 80. Chance of rain

20 percent. 

.MONDAY NIGHT...Mostly clear. A slight chance of showers and

thunderstorms in the evening. Lows in the lower 50s. Chance of

rain 20 percent. 

.TUESDAY...Mostly sunny. A slight chance of showers and

thunderstorms in the afternoon. Highs in the upper 70s. Chance of

rain 20 percent. 



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