Don Day's Wyoming Weather Forecast: Tuesday, September 23, 2025

Mostly sunny in much of Wyoming on Tuesday with a chance for rain in some areas, especially in the southeast. Partly cloudy to mostly clear overnight. Highs from the low 50s to the low 70s and lows in the 30s and 40s.

September 23, 20254 min read

Sublette County
Fall colors near Sacred Rim Trail Point, Wind River Range outside of Pinedale
Fall colors near Sacred Rim Trail Point, Wind River Range outside of Pinedale (Reader photo: Vince Meyer)

Mostly sunny in much of Wyoming on Tuesday with a chance for rain in some areas, especially in the southeast. Partly cloudy to mostly clear overnight. Highs from the low 50s to the low 70s and lows in the 30s and 40s.

Central:  

Casper:  Chance of rain mainly before 10 a.m., gradually becoming mostly sunny today with a high near 65 and mostly clear overnight with a low near 42.

Riverton:  Slight chance of rain before 8 a.m., patchy fog before 9 a.m., gradually becoming sunny today with a high near 68 and mostly clear overnight with a low near 41.

Shoshoni:  Gradually clearing skies today with a high near 69 and mostly clear overnight with a low near 43.

Southwest:  

Evanston Sunny today with a high near 61 and mostly clear overnight with a low near 35.

Green River:  Chance of rain mainly before 7 a.m., gradually becoming sunny today with a high near 64 and mostly clear overnight with a low near 39.

South Pass:  Slight chance of rain before 9 a.m., otherwise mostly sunny today with a high near 59 and wind gusts as high as 21 mph. Mostly clear overnight with a low near 39.

Western Wyoming:  

Pinedale:  Areas of fog before 9 a.m., otherwise sunny today with a high near 63 and mostly clear overnight with a low near 32. 

Alpine:  Freeze warning until 10 a.m. Patchy fog before 9 a.m., otherwise sunny today with a high near 70 and mostly clear overnight with a low near 37.

Big Piney:  Areas of fog before 9 a.m., otherwise sunny today with a high near 64 and mostly clear overnight with a low near 31.

Northwest: 

Dubois Patchy fog before 9 a.m., otherwise sunny today with a high near 62 and mostly clear overnight with a low near 37.

Jackson:  Freeze warning until 10 a.m. Areas of fog before 9 a.m., otherwise sunny today with a high near 68 and mostly clear overnight with a low near 34.

Old Faithful in Yellowstone National Park:  Areas of fog before 10 a.m., otherwise sunny today with a high near 64 and mostly clear overnight with a low near 29.

­­Bighorn Basin:  

Thermopolis Gradually becoming sunny today with a high near 71 and mostly clear overnight with a low near 45. 

Cody:  Sunny today with a high near 69 and mostly clear overnight with a low near 46. 

Greybull:  Sunny today with a high near 72 and mostly clear overnight with a low near 44.

North Central:  

Buffalo:  Sunny today with a high near 67 and mostly clear overnight with a low near 48.

Sheridan:  Patchy fog before 9 a.m., otherwise sunny today with a high near 73 and mostly clear overnight with a low near 41.

Big Horn:  Sunny today with a high near 71 and mostly clear overnight with a low near 45.

Northeast:  

Gillette:  Sunny today with a high near 70 and mostly clear overnight with a low near 48 and wind gusts as high as 16 mph.

Newcastle: Mostly sunny today with a high near 72 and wind gusts as high as 20 mph. Mostly clear overnight with a low near 46.

Hulett:  Sunny today with a high near 72 and clear overnight with a low near 46. 

Eastern Plains:  

Torrington:  Chance of rain mainly in the morning, mostly cloudy today with a high near 68 and partly cloudy overnight with a low near 44.

Wheatland:  Rain likely, cloudy today with a high near 63 and partly cloudy overnight with a low near 46.

Kaycee:  Gradually becoming sunny today with a high near 69 and mostly clear overnight with a low near 42.

Southeast:  

Cheyenne:  Rain likely, breezy today with a high near 53 and wind gusts as high as 30 mph. Gradually becoming mostly clear overnight with a slight chance of rain before midnight and a low near 42.

Laramie:  Rain likely today with a high near 50 and partly cloudy overnight with a slight chance of rain before 9 p.m., patchy frost after 3 a.m. and a low near 34.

Chugwater:  Rain likely today with a high near 58 and gradually becoming mostly clear overnight with a low near 44.

South Central:  

Rawlins:  Chance of rain mainly before noon, mostly cloudy today with a high near 56 and mostly clear overnight with a low near 35.

Encampment:  Rain likely today with a high near 52 and partly cloudy overnight with areas of frost after 3 a.m. and a low near 33.

Wamsutter:  Chance of rain, gradually clearing skies, breezy today with a high near 58 and wind gusts as high as 22 mph. Mostly clear overnight with a low near 35.