Yellowstone National Park Forecast

FPUS55 KRIW 211603

ZFPRIW



Zone Forecast Product for Western and Central Wyoming

National Weather Service Riverton WY

902 AM MST Wed Jan 21 2026



WYZ020-212300-

Natrona County Lower Elevations-

WYZ001-212300-

Yellowstone National Park-

Including the cities of Lake, Mammoth, and Old Faithful

902 AM MST Wed Jan 21 2026



.TODAY...Mostly sunny this morning, then becoming partly cloudy.

Cold with highs 16 to 22. Southwest winds around 10 mph this

afternoon. 

.TONIGHT...Partly cloudy. Cold with lows zero to 6 above zero. 

.THURSDAY...Partly cloudy. Highs in the lower 20s. 

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

mostly cloudy. Cold with lows 3 below to 3 above zero. 

.FRIDAY...Partly cloudy in the morning, then clearing. Cold with

highs 11 to 19. Northwest winds around 10 mph in the afternoon. 

.FRIDAY NIGHT...Mostly clear. Cold with lows 5 below to 15 below

zero. 

.SATURDAY...Mostly sunny in the morning, then becoming partly

cloudy. Cold with highs 10 to 15. 

.SATURDAY NIGHT...Partly cloudy. Cold with lows 5 below to zero. 

.SUNDAY...Partly cloudy. Cold with highs 15 to 20. 

.SUNDAY NIGHT...Mostly clear. Cold with lows 5 below to zero. 

.MONDAY...Mostly sunny. A slight chance of. Highs in the lower

20s. 

.MONDAY NIGHT...Partly cloudy. Cold with lows 5 to 10 above. 

.TUESDAY...Mostly cloudy in the morning, then becoming partly

cloudy. Highs in the mid 20s. 



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