Don Day's Wyoming Weather Forecast: Friday, September 18, 2026

Chance of rain in Wyoming on Friday and overnight. Fog, flood watch in some areas. Highs from the mid 60s to mid 80s. Lows from the low 30s to mid 50s.

CK
Coy Knobel

September 18, 20265 min read

Albany County
"Sunset over Snowy Range."
"Sunset over Snowy Range." (Reader photo: Ernie Mecca)

Chance of rain in Wyoming on Friday and overnight. Fog, flood watch in some areas. Highs from the mid 60s to mid 80s. Lows from the low 30s to mid 50s.

 

Central:  

Casper:  Chance of rain mainly after 4 p.m., otherwise mostly sunny today with a high near 80 and wind gusts as high as 21 mph. Rain likely overnight with patchy fog after 3 a.m. and a low near 52.

 

Riverton:  Patchy fog before 8 a.m., chance of rain, otherwise mostly sunny today with a high near 80 and rain likely overnight with patchy fog after 4 a.m. and a low near 51.

 

Glenrock:   Slight chance of rain after 3 p.m., increasing clouds today with a high near 81 and mostly cloudy overnight with rain likely and a low near 51.

 

Southwest:  

Evanston  Rain likely, mostly cloudy today with a high near 66 and mostly cloudy overnight with a chance of rain and a low near 42.

 

Green River:   Patchy fog before 8 a.m., rain likely, otherwise mostly sunny today with a high near 75 and cloudy, becoming partly cloudy overnight with rain likely and a low near 45.

 

Cokeville:   Patchy fog before 10 a.m., rain likely (some storms could be severe) today with a high near 68 and rain likely (some storms could be severe) overnight with patchy fog after 9 p.m. and a low near 34.

 

Western Wyoming:  

Pinedale:   Patchy fog before 9 a.m., rain likely today with a high near 67 and rain likely overnight with patchy fog after 11 p.m. and a low near 41.

 

Alpine Patchy fog before 11 a.m., rain likely (some storms could be severe) today with a high near 71 and rain overnight (some storms could be severe) with patchy fog after 10 p.m. and a low near 43.

 

Big Piney:   Patchy fog before 10 a.m., rain likely, partly sunny today with a high near 67 and mostly cloudy overnight with rain likely, patchy fog and a low near 36.

 

Northwest: 

Dubois  Rain likely today with a high near 66 and mostly cloudy overnight with rain likely, patchy fog after 2 a.m. and a low near 41.

 

Jackson:   Patchy fog before 10 a.m., rain likely (some storms could be severe) today with a high near 70 and rain near certain overnight (some storms could be severe) with patchy fog after 1 a.m. and a low near 41.

 

Old Faithful in Yellowstone National Park:   Patchy fog before 11 a.m., rain near certain (some storms could be severe) today with a high near 64 and rain near certain overnight (some storms could be severe) with patchy fog after 8 p.m. and a low near 37.

 

Bighorn Basin:  

Thermopolis:   Chance of rain mainly after 5 p.m., otherwise mostly sunny today with a high near 81 and rain near certain overnight with patchy fog after 4 a.m. and a low near 52.

 

Cody:   Flood watch from noon today through Sunday. Rain likely, increasing clouds today with a high near 76 and rain overnight with a low near 53.

 

Ten Sleep:  Chance of rain mainly after 4 p.m., otherwise sunny today with a high near 81 and rain overnight with patchy fog after 4 a.m. and a low near 54.

 

North Central:  

Buffalo:   Flood watch from noon today through Sunday. Chance of rain mainly after 4 p.m., otherwise mostly sunny today with a high near 77 and rain overnight with a low near 56.

 

Sheridan:   Flood watch from noon today through Sunday. Patchy fog before 9 a.m., chance of rain mainly after 3 p.m., otherwise mostly sunny today with a high near 81 and rain near certain overnight with patchy fog after midnight and a low near 54.

 

Big Horn:   Flood watch from noon today through Sunday. Chance of rain, otherwise mostly sunny today with a high near 79 and rain near certain overnight with patchy fog after midnight and a low near 53.

 

Northeast:  

Gillette:  Mostly sunny today with a high near 79 and wind gusts as high as 20 mph. Cloudy overnight with rain likely, a low near 55 and wind gusts as high as 20 mph.

 

Newcastle:   Gradually becoming mostly sunny today with a high near 78 and mostly cloudy overnight with a chance of rain and a low near 54.

 

Hulett:  Gradually becoming mostly sunny today with a high near 80 and wind gusts as high as 16 mph. Increasing clouds overnight with rain likely, a low near 51 and wind gusts as high as 16 mph.

 

Eastern Plains:  

Torrington:  Patchy fog before 9 a.m., otherwise mostly sunny today with a high near 85 and mostly cloudy overnight with a chance of rain and a low near 55.

 

Douglas:   Chance of rain after noon, increasing clouds today with a high near 81 and mostly cloudy overnight with a chance of rain and a low near 49.

 

Kaycee:  Flood watch from noon today through Sunday. Chance of rain mainly after 3 p.m., increasing clouds today with a high near 81 and rain near certain overnight with patchy fog after 1 a.m. and a low near 52.

 

Southeast:  

Cheyenne:   Chance of rain after noon, partly sunny today with a high near 78 and gradually becoming mostly clear overnight with a chance of rain and a low near 51.

 

Laramie:  Chance of rain after noon, partly sunny today with a high near 73 and partly cloudy overnight with a chance of rain before midnight and a low near 47.

 

Chugwater:  Chance of rain mainly after 3 p.m., partly sunny today with a high near 81 and mostly cloudy overnight with a chance of rain and a low near 54.

 

South Central:  

Rawlins:   Chance of rain mainly after 3 p.m., partly sunny today with a high near 73 and mostly cloudy overnight with a chance of rain and a low near 48.

 

Saratoga:   Chance of rain after noon, partly sunny today with a high near 73 and partly cloudy overnight with a chance of rain and a low near 43.

 

Wamsutter:   Chance of rain mainly after 5 p.m., partly sunny today with a high near 70 and wind gusts as high as 22 mph. Mostly cloudy overnight with rain likely, a low near 44 and wind gusts as high as 20 mph.

Authors

CK

Coy Knobel

Night Editor