Don Day's Wyoming Weather Forecast: Monday, August 31, 2026

Partly to mostly sunny in Wyoming on Monday and mostly cloudy overnight with a chance of rain in some areas. Highs in the 70s and 80s. Lows mainly in the 40s and 50s.

CK
Coy Knobel

August 31, 20264 min read

Park County
Gorgeous sunset was the reward for enduring a very hot camping trip near Yellowstone! The days were warm but the nights cooled off nicely after the sun went down!
Gorgeous sunset was the reward for enduring a very hot camping trip near Yellowstone! The days were warm but the nights cooled off nicely after the sun went down! (Reader photo: Kathleen Wormald)

Partly to mostly sunny in Wyoming on Monday and mostly cloudy overnight with a chance of rain in some areas. Highs in the 70s and 80s. Lows mainly in the 40s and 50s.

 

Central:  

Casper:  Mostly sunny and breezy today with a high near 84 and wind gusts as high as 21 mph. Cloudy overnight with a chance of rain and low near 59.

 

Riverton:  Increasing clouds today with a high near 83 and becoming cloudy overnight with a low near 57.

 

Glenrock:   Mostly sunny today with a high near 84 and wind gusts as high as 25 mph. Cloudy overnight with a chance of rain mainly after 5 a.m. and a low near 58.

 

Southwest:  

Evanston  Chance of rain after noon, otherwise partly sunny today with a high near 74 and mostly cloudy overnight with a chance of rain and a low near 45.

 

Green River:   Slight chance of rain after 4 p.m., otherwise partly sunny today with a high near 77 and cloudy, gradually becoming partly cloudy overnight with a chance of rain and a low near 50.

 

Kemmerer:   Slight chance of rain after 3 p.m., increasing clouds today with a high near 74 and breezy, cloudy, gradually becoming partly cloudy overnight with a chance of rain, a low near 45 and wind gusts as high as 22 mph.

 

Western Wyoming:  

Pinedale:   Areas of frost before 8 a.m., mostly sunny today with a high near 71 and rain likely overnight with a low near 44.

 

Alpine Sunny today with a high near 79 and rain likely overnight with a low near 45.

 

Big Piney:  Areas of frost before 8 a.m., mostly sunny today with a high near 72 and mostly cloudy overnight with a chance of rain and a low near 42.

 

Northwest: 

Dubois Increasing clouds and breezy today with a high near 71 and wind gusts as high as 22 mph. Increasing clouds overnight with a chance of rain and a low near 45.

 

Jackson:  Areas of frost before 8 a.m., sunny today with a high near 78 and mostly cloudy overnight with rain likely and a low near 42.

 

Old Faithful in Yellowstone National Park:  Widespread frost mainly before 8 a.m., sunny today with a high near 69 and increasing clouds overnight with a chance of rain mainly after 5 a.m. and a low near 37.

 

Bighorn Basin:  

Thermopolis:  Increasing clouds today with a high near 84 and increasing clouds overnight with a low near 57.

 

Cody:  Sunny today with a high near 80 and wind gusts as high as 20 mph. Mostly cloudy overnight with a low near 55.

 

Lovell:  Sunny today with a high near 81 and mostly cloudy overnight with a low near 52.

 

North Central:  

Buffalo:   Increasing clouds today with a high near 79 and mostly cloudy overnight with a low near 58.

 

Sheridan:   Patchy smoke after 9 a.m., sunny today with a high near 83 and mostly cloudy overnight with a low near 48.

 

Dayton:   Patchy smoke after 9 a.m., sunny today with a high near 81 and mostly cloudy overnight with a low near 53.

 

Northeast:  

Gillette:  Increasing clouds today with a high near 82 and wind gusts as high as 17 mph. Mostly cloudy overnight with a low near 54 and wind gusts as high as 20 mph.

 

Newcastle:   Sunny today with a high near 84 and mostly cloudy overnight with a slight chance of rain after midnight and a low near 56.

 

Hulett:  Increasing clouds today with a high near 86 and mostly cloudy overnight with a low near 49.

 

Eastern Plains:  

Torrington:  Mostly sunny today with a high near 89 and mostly cloudy overnight with a low near 60.

 

Douglas:   Mostly sunny today with a high near 86 and mostly cloudy overnight with a slight chance of rain and a low near 57.

 

Midwest:  Increasing clouds today with a high near 83 and wind gusts as high as 20 mph. Mostly cloudy overnight with a slight chance of rain after 5 a.m. and a low near 56.

 

Southeast:  

Cheyenne:   Partly sunny today with a high near 80 and mostly cloudy overnight with a chance of rain and a low near 56.

 

Laramie:  Slight chance of rain after 4 p.m., otherwise partly sunny today with a high near 77 and cloudy overnight with a chance of rain before midnight and a low near 51.

 

Chugwater:  Partly sunny today with a high near 83 and cloudy overnight with a chance of rain before midnight and a low near 59.

 

South Central:  

Rawlins:   Partly sunny today with a high near 75 and cloudy overnight with a chance of rain and a low near 53.

 

Saratoga:   Increasing clouds today with a high near 77 and mostly cloudy overnight with rain likely and a low near 47.

 

Wamsutter:   Increasing clouds today with a high near 75 and cloudy overnight with a chance of rain and a low near 49.

Authors

CK

Coy Knobel

Night Editor