Don Day's Wyoming Weather Forecast: Sunday, September 21, 2025

Mix of clouds, chances for rain and sun in Wyoming on Sunday. Breezy in some areas. Highs from the low 60s to the mid 80s and lows from the mid 30s to the low 50s.

CK
Coy Knobel

September 21, 20255 min read

Sublette County
Wind River Mountain sunset
Wind River Mountain sunset (Reader photo: Milford Lockwood)

Mix of clouds, chances for rain and sun in Wyoming on Sunday. Breezy in some areas. Highs from the low 60s to the mid 80s and lows from the mid 30s to the low 50s.

Central:  

Casper:  Sunny and breezy today with a high near 79 and wind gusts as high as 24 mph. Partly cloudy overnight with a slight chance of rain before midnight, a low near 52 and wind gusts as high as 20 mph.

Riverton:  Slight chance of rain after 3 p.m., otherwise mostly sunny today with a high near 80 and wind gusts as high as 21 mph. Partly cloudy overnight with a low near 48 and wind gusts as high as 21 mph.

Jeffrey City:  Slight chance of rain after 3 p.m., otherwise mostly sunny and breezy today with a high near 74 and wind gusts as high as 30 mph. Partly cloudy and breezy overnight with a low near 44 and wind gusts as high as 26 mph.

Southwest:  

Evanston Chance of rain, otherwise partly sunny today with a high near 69 and mostly cloudy overnight with a chance of rain and a low near 43.

Green River:  Slight chance of rain after noon, breezy, gradually becoming sunny today with a high near 75 and wind gusts as high as 28 mph. Partly cloudy and breezy overnight with a chance of rain mainly after midnight, a low near 47 and wind gusts as high as 26 mph. 

Lyman:  Chance of rain, otherwise mostly sunny today with a high near 73 and wind from 6-16 mph. Mostly cloudy overnight with a chance of rain mainly after midnight and a low near 46.

Western Wyoming:  

Pinedale:  Rain likely, otherwise gradually becoming mostly sunny today with a high near 64 and partly cloudy overnight with a chance of rain, a low near 37 and wind gusts as high as 20 mph.

Alpine:  Rain likely today with a high near 69 and mostly cloudy overnight with rain likely and a low near 41.

Big Piney:  Chance of rain, otherwise breezy, gradually becoming mostly sunny today with a high near 67 and wind gusts as high as 23 mph. Partly cloudy and breezy overnight with a chance of rain, a low near 36 and wind gusts as high as 24 mph. 

Northwest: 

Dubois Chance of rain mainly after 1 p.m., increasing clouds and breezy today with a high near 66 and wind gusts as high as 24 mph. Mostly cloudy and breezy overnight with a chance of rain, a low near 43 and wind gusts as high as 25 mph.

Jackson:  Rain likely, gradually becoming mostly sunny today with a high near 66 and rain likely overnight with a low near 39. 

Old Faithful in Yellowstone National Park:  Patchy fog before 10 a.m., rain likely, increasing clouds today with a high near 62 and rain near certain overnight with a low near 33.

­­Bighorn Basin:  

Thermopolis Increasing clouds and breezy today with a high near 82 and wind gusts as high as 23 mph. Mostly cloudy overnight with a slight chance of rain, a low near 50 and wind gusts as high as 20 mph.

Cody:  Chance of rain mainly after 5 p.m., increasing clouds and breezy today with a high near 79 and wind gusts as high as 24 mph. Mostly cloudy and breezy overnight with a chance of rain, a low near 49 and wind gusts as high as 30 mph.

Lovell:  Increasing clouds today with a high near 83 and mostly cloudy overnight with a chance of rain, a low near 52 and wind gusts as high as 23 mph.

North Central:  

Buffalo:  Increasing clouds today with a high near 80 and mostly cloudy and breezy overnight with a low near 51 and wind gusts as high as 23 mph. 

Sheridan:  Increasing clouds today with a high near 84 and mostly cloudy overnight with a slight chance of rain after midnight and a low near 47.

Clearmont:  Sunny today with a high near 84 and mostly cloudy overnight with a low near 49.

Northeast:  

Gillette:  Sunny today with a high near 82 and mostly cloudy overnight with a low near 51 and wind gusts as high as 20 mph.

Newcastle:  Sunny today with a high near 80 and partly cloudy overnight with a low near 52.

Upton:  Sunny today with a high near 83 and partly cloudy overnight with a low near 49.

Eastern Plains:  

Torrington:  Sunny today with a high near 85 and partly cloudy overnight with a low near 52.

Douglas:  Increasing clouds today with a high near 82 and partly cloudy overnight with a low near 52.

Midwest:  Increasing clouds today with a high near 81 and wind gusts as high as 21 mph. Mostly cloudy overnight with a slight chance of rain before midnight, a low near 49 and wind gusts as high as 21 mph.

Southeast:  

Cheyenne:  Slight chance of rain after 3 p.m., increasing clouds today with a high near 77 and partly cloudy overnight with a low near 52.

Laramie:  Chance of rain after noon, increasing clouds today with a high near 70 and partly cloudy overnight with a slight chance of rain before midnight and a low near 45.

Medicine Bow:  Slight chance of rain after noon, otherwise mostly sunny and breezy today with a high near 73 and wind from 10-20 mph. Partly cloudy overnight with a slight chance of rain before midnight and a low near 45.

South Central:  

Rawlins:  Slight chance of rain after noon, otherwise mostly sunny and breezy today with a high near 70 and wind gusts as high as 30 mph. Partly cloudy overnight with a slight chance of rain, a low near 47 and wind gusts as high as 25 mph.

Encampment:  Chance of rain after noon, otherwise mostly sunny today with a high near 69 and mostly cloudy overnight with a chance of rain and a low near 43.

Hanna:  Slight chance of rain after 3 p.m., otherwise mostly sunny and breezy today with a high near 70 and wind gusts as high as 30 mph. Partly cloudy and breezy overnight with a slight chance of rain before midnight, a low near 44 and wind from 15-20 mph.

Authors

CK

Coy Knobel

Night Editor