Don Day's Wyoming Weather Forecast: Sunday, September 20, 2026

Sunny in parts of western Wyoming on Sunday, chance of rain in the rest of the state. Chance of rain in some areas overnight. Highs mainly in the 60s. Lows from the upper 20s to upper 40s.

CK
Coy Knobel

September 20, 20265 min read

Teton County
Sunset at Moose Head Ranch
Sunset at Moose Head Ranch (Reader photo: Louise Davenport)

Sunny in parts of western Wyoming on Sunday, chance of rain in the rest of the state. Chance of rain in some areas overnight. Highs mainly in the 60s. Lows from the upper 20s to upper 40s.

 

Central:  

CasperChance of rain, mostly cloudy today with a high near 63 and wind gusts as high as 21 mph. Mostly cloudy overnight with a slight chance of rain before 9 p.m. and a low near 42.

Riverton:  Patchy fog and a chance of rain mainly before 9 a.m., partly sunny today with a high near 65 and partly cloudy overnight with a low near 43.

Jeffrey City:   Patchy fog before 9 a.m., chance of rain, gradually becoming mostly sunny today with a high near 62 and mostly cloudy overnight with a low near 38.

 

Southwest:  

Evanston:   Sunny today with a high near 63 and mostly clear overnight with a low near 33.

Green River:   Sunny today with a high near 66 and mostly clear overnight with a low near 37.

Kemmerer:   Sunny today with a high near 62 and wind gusts as high as 20 mph. Mostly clear overnight with a low near 33.

 

Western Wyoming:  

Pinedale:   Patchy fog before 10 a.m., otherwise mostly sunny today with a high near 61 and partly cloudy overnight a low near 32.

Alpine:  Areas of fog before 10 a.m., mostly sunny today with a high near 66 and mostly clear overnight with a low near 35.

Big Piney:   Patchy fog before 10 a.m., otherwise mostly sunny today with a high near 61 and partly cloudy overnight a low near 28.

 

Northwest: 

Dubois:   Chance of rain, partly sunny today with a high near 59 and mostly cloudy overnight with a slight chance of rain before 9 p.m. and a low near 37.

Jackson:   Areas of fog before 10 a.m., mostly sunny today with a high near 65 and partly cloudy overnight with a low near 33.

Old Faithful in Yellowstone National Park:   Flood watch until 6 p.m. Areas of fog before 11 a.m., slight chance of rain after 3 p.m., mostly cloudy today with a high near 58 and partly cloudy overnight with a low near 29.

 

Bighorn Basin:  

Thermopolis:   Patchy fog before 9 a.m., chance of rain, cloudy, gradually becoming mostly sunny today with a high near 65 and mostly cloudy overnight with a low near 43.

Cody:   Flood watch until 6 p.m. Patchy fog before 9 a.m., chance of rain, mostly cloudy today with a high near 62 and gradually becoming mostly clear overnight with a low near 45.

Lovell:  Chance of rain, mostly cloudy today with a high near 65 and mostly cloudy overnight with a low near 45.

 

North Central:  

Buffalo:   Flood watch until 6 p.m. Rain likely, mostly cloudy today with a high near 60 and mostly cloudy overnight with a chance of rain before midnight and a low near 48.

Sheridan:   Flood watch until 6 p.m. Patchy fog before 9 a.m., rain likely today with a high near 63 and mostly cloudy overnight with a chance of rain mainly before 10 p.m., areas of fog after 9 p.m. and a low near 44.

Dayton:   Flood watch until 6 p.m. Patchy fog before 9 a.m., rain likely today with a high near 62 and mostly cloudy overnight with a chance of rain mainly before 9 p.m., patchy fog after 9 p.m. and a low near 44.

 

Northeast:  

Gillette:  Rain likely today with a high near 60 and wind gusts as high as 23 mph. Cloudy overnight with rain likely, a low near 46 and wind gusts as high as 22 mph.

Newcastle:   Rain near certain today with a high near 61 and rain likely overnight with a low near 47.

Moorcroft:  Rain likely today with a high near 64 and wind gusts as high as 18 mph. Rain likely overnight with a low near 43 and wind gusts as high as 17 mph.

 

Eastern Plains:  

Torrington:  Rain likely, partly sunny today with a high near 69 and mostly cloudy overnight with a chance of rain and a low near 47.

Wheatland:   Rain likely, partly sunny today with a high near 69 and partly cloudy overnight with a slight chance of rain before 9 p.m. and a low near 47.

Midwest:  Rain likely, mostly cloudy today with a high near 62 and mostly cloudy overnight with a chance of rain mainly before 7 p.m. and a low near 44.

 

Southeast:  

Cheyenne:   Rain likely, gradually becoming sunny today with a high near 66 and partly cloudy overnight with a low near 42.

Laramie:  Chance of rain, partly sunny today with a high near 61 and wind gusts as high as 25 mph. Mostly clear overnight with a low near 39.

Pine Bluffs:  Rain likely today with a high near 68 and partly cloudy overnight with a low near 43.

 

South Central:  

Rawlins:   Chance of rain, partly sunny today with a high near 62 and partly cloudy overnight with a low near 40.

Saratoga:   Chance of rain, partly sunny today with a high near 62 and partly cloudy overnight with a low near 34.

Baggs:   Mostly sunny today with a high near 63 and mostly clear overnight with a low near 34.

Authors

CK

Coy Knobel

Night Editor