National Weather Service Forecast for: Casper WY
Issued by: National Weather Service Riverton, WY
Updated: 12:32 pm MDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 80. Breezy, with a south southwest wind 18 to 21 mph becoming west. Winds could gust as high as 32 mph.
Sunny and
Breezy

 Tonight

Tonight: Partly cloudy, with a low around 49. Breezy, with a west southwest wind 10 to 17 mph, with gusts as high as 28 mph.
Partly Cloudy
and Breezy
then Partly
Cloudy
 Friday

Friday: Sunny, with a high near 79. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunny and
Breezy

 Friday
Night
Friday Night: Mostly clear, with a low around 49. West northwest wind 8 to 14 mph becoming southwest after midnight. Winds could gust as high as 23 mph.
Mostly Clear

 Saturday

Saturday: Mostly sunny, with a high near 83. Windy, with a southwest wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 38 mph.
Mostly Sunny
and Windy

 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 40. Breezy, with a west wind 19 to 24 mph becoming north northeast 8 to 13 mph in the evening. Winds could gust as high as 37 mph.
Mostly Cloudy
and Breezy
then Mostly
Cloudy
 Sunday

Sunday: Partly sunny, with a high near 64. North northeast wind around 7 mph becoming west northwest in the afternoon.
Partly Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 37.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 71. Breezy.
Mostly Sunny
then Partly
Sunny and
Breezy
Hi 80 °F Lo 49 °F Hi 79 °F Lo 49 °F Hi 83 °F Lo 40 °F Hi 64 °F Lo 37 °F Hi 71 °F

Hazardous Weather Outlook
Red Flag Warning
 

This Afternoon
 
 Sunny, with a high near 80. Breezy, with a south southwest wind 18 to 21 mph becoming west. Winds could gust as high as 32 mph.
Tonight
 
 Partly cloudy, with a low around 49. Breezy, with a west southwest wind 10 to 17 mph, with gusts as high as 28 mph.
Friday
 
 Sunny, with a high near 79. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
 
 Mostly clear, with a low around 49. West northwest wind 8 to 14 mph becoming southwest after midnight. Winds could gust as high as 23 mph.
Saturday
 
 Mostly sunny, with a high near 83. Windy, with a southwest wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 38 mph.
Saturday Night
 
 Mostly cloudy, with a low around 40. Breezy, with a west wind 19 to 24 mph becoming north northeast 8 to 13 mph in the evening. Winds could gust as high as 37 mph.
Sunday
 
 Partly sunny, with a high near 64. North northeast wind around 7 mph becoming west northwest in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 37.
Monday
 
 Mostly sunny, with a high near 71. Breezy.
Monday Night
 
 Mostly cloudy, with a low around 46.
Tuesday
 
 Partly sunny, with a high near 78. Breezy.
Tuesday Night
 
 Partly cloudy, with a low around 59. Breezy.
Wednesday
 
 Mostly sunny, with a high near 80. Very windy.

 

Forecast from NOAA-NWS for Casper WY.