Don Day's Wyoming Weather Forecast: Monday, August 17, 2026

Mostly sunny in Wyoming on Monday with a chance of afternoon rain in some areas. Partly cloudy overnight with a chance of rain. Highs from the low 70s to near 90. Lows from the low 40s to near 60.

CK
Coy Knobel

August 17, 20264 min read

Teton County
Rainbow over Teton Pass
Rainbow over Teton Pass (Reader photo: Candice Shy Hooper)

Mostly sunny in Wyoming on Monday with a chance of afternoon rain in some areas. Partly to mostly cloudy overnight with a chance of rain in some locations.  Highs from the low 70s to near 90. Lows from the low 40s to near 60.

 

Central:  

Casper:  Sunny today with a high near 84 and becoming cloudy overnight with a low near 56.

 

Riverton:  Sunny today with a high near 86 and mostly cloudy overnight with a slight chance of rain before 7 p.m. and a low near 56.

 

Shoshoni:   Sunny today with a high near 86 and mostly clear overnight with a low near 59.

 

Southwest:  

Evanston  Sunny today with a high near 81 and partly cloudy overnight with a low near 52.

 

Green River:   Sunny today with a high near 86 and mostly cloudy overnight with a low near 57.

 

Cokeville:   Mostly sunny and breezy today with a high near 80 and wind gusts as high as 24 mph. Mostly cloudy overnight with a low near 43.

 

Western Wyoming:  

Pinedale:   Slight chance of rain after 2 p.m., otherwise mostly sunny today with a high near 75 and mostly cloudy and breezy overnight with a low near 46 and wind gusts as high as 22 mph.

 

Alpine Slight chance of rain after 2 p.m., increasing clouds and breezy today with a high near 82 and wind gusts as high as 23 mph. Mostly cloudy overnight with a chance of rain and a low near 49.

 

Big Piney:  Increasing clouds today with a high near 77 and mostly cloudy overnight a low near 44.

 

Northwest: 

Dubois Slight chance of rain after 2 p.m., increasing clouds and breezy today with a high near 73 and wind gusts as high as 29 mph. Mostly cloudy overnight with a chance of rain, a low near 49 and wind gusts as high as 20 mph.

 

Jackson:  Slight chance of rain after 2 p.m., increasing clouds today with a high near 80 and cloudy, gradually becoming partly cloudy overnight with a chance of rain and a low near 48.

 

Old Faithful in Yellowstone National Park:  Slight chance of rain after 2 p.m., otherwise partly sunny today with a high near 74 and mostly cloudy overnight with a chance of rain and a low near 40.

 

Bighorn Basin:  

Thermopolis:  Slight chance of rain after 3 p.m., otherwise mostly sunny today with a high near 86 and mostly cloudy overnight with a slight chance of rain before 9 p.m. and a low near 58.

 

Cody:  Chance of rain mainly after 3 p.m., otherwise mostly sunny and breezy today with a high near 79 and wind gusts as high as 22 mph. Mostly cloudy overnight with a chance of rain and a low near 57.

 

Worland:  Mostly sunny today with a high near 85 and mostly cloudy overnight with a slight chance of rain and a low near 56.

 

North Central:  

Buffalo:   Slight chance of rain after 4 p.m., otherwise mostly sunny today with a high near 80 and mostly cloudy overnight with a chance of rain and a low near 59.

 

Sheridan:   Patchy fog before 9 a.m., mostly sunny today with a high near 84 and mostly cloudy overnight with a chance of rain, patchy fog after 3 a.m. and a low near 52.

 

Clearmont:   Mostly sunny today with a high near 84 and mostly cloudy overnight with a chance of rain and a low near 54.

 

Northeast:  

Gillette:  Mostly sunny today with a high near 85 and wind gusts as high as 21 mph. Mostly cloudy overnight with a chance of rain mainly before midnight, a low near 57 and wind gusts as high as 20 mph.

 

Newcastle:   Sunny today with a high near 84 and wind gusts as high as 18 mph. Partly cloudy overnight with a slight chance of rain after midnight, a low near 59 and wind gusts as high as 16 mph.

 

Upton:  Sunny today with a high near 86 and wind gusts as high as 17 mph. Mostly cloudy overnight with a slight chance of rain, a low near 56 and wind gusts as high as 16 mph.

 

Eastern Plains:  

Torrington:  Sunny and hot today with a high near 90 and mostly clear overnight with a low near 60.

 

Lusk:   Sunny today with a high near 84 and partly cloudy overnight with a low near 57.

 

Kaycee:  Sunny today with a high near 85 and cloudy, gradually becoming partly cloudy overnight with a low near 55 and wind gusts as high as 20 mph.

 

Southeast:  

Cheyenne:   Sunny today with a high near 84 and partly cloudy overnight a low near 58.

 

Laramie:  Mostly sunny today with a high near 79 and partly cloudy overnight with a low near 55.

 

Medicine Bow:  Sunny today with a high near 82 and partly cloudy overnight with a low near 51.

 

South Central:  

Rawlins:   Sunny today with a high near 81 and mostly cloudy overnight a low near 58.

 

Saratoga:   Sunny today with a high near 82 and partly cloudy overnight with a low near 54.

 

Hanna:   Sunny today with a high near 81 and mostly cloudy overnight a low near 55.

Authors

CK

Coy Knobel

Night Editor