National Weather Service Forecast for: Casper WY
Issued by: National Weather Service Riverton, WY
Updated: 3:32 am MDT Jun 22, 2026
 
Overnight

Overnight: Mostly clear, with a low around 48. East northeast wind 5 to 9 mph becoming light.
Mostly Clear

 Monday

Monday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of thunderstorms after 5pm. Increasing clouds, with a high near 85. Breezy, with a light and variable wind becoming west 12 to 17 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 10%.
Sunny then
Slight Chance
T-storms and
Breezy
 Monday
Night
Monday Night: Increasing clouds, with a low around 51. West northwest wind 7 to 14 mph becoming east northeast in the evening. Winds could gust as high as 21 mph.
Increasing
Clouds

 Tuesday

Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 78. East northeast wind 5 to 10 mph.
Decreasing
Clouds

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 50. East northeast wind 5 to 14 mph, with gusts as high as 23 mph.
Partly Cloudy

 Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Light east wind becoming east northeast 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Partly Sunny
then Chance
T-storms
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 50. East northeast wind 9 to 14 mph becoming light east after midnight. Winds could gust as high as 23 mph.
Chance
T-storms then
Slight Chance
T-storms
 Thursday

Thursday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Mostly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.
Slight Chance
T-storms then
Partly Cloudy
Lo 48 °F Hi 85 °F Lo 51 °F Hi 78 °F Lo 50 °F Hi 80 °F Lo 50 °F Hi 83 °F Lo 52 °F

 

Overnight
 
 Mostly clear, with a low around 48. East northeast wind 5 to 9 mph becoming light.
Monday
 
 A slight chance of showers and thunderstorms before 3pm, then a slight chance of thunderstorms after 5pm. Increasing clouds, with a high near 85. Breezy, with a light and variable wind becoming west 12 to 17 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 10%.
Monday Night
 
 Increasing clouds, with a low around 51. West northwest wind 7 to 14 mph becoming east northeast in the evening. Winds could gust as high as 21 mph.
Tuesday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 78. East northeast wind 5 to 10 mph.
Tuesday Night
 
 Partly cloudy, with a low around 50. East northeast wind 5 to 14 mph, with gusts as high as 23 mph.
Wednesday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Light east wind becoming east northeast 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 50. East northeast wind 9 to 14 mph becoming light east after midnight. Winds could gust as high as 23 mph.
Thursday
 
 A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 52.
Friday
 
 Mostly sunny, with a high near 92. Breezy.
Friday Night
 
 Partly cloudy, with a low around 58. Breezy.
Saturday
 
 A slight chance of showers and thunderstorms. Sunny, with a high near 88. Windy.
Saturday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 51. Breezy.
Sunday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. Windy.

 

Forecast from NOAA-NWS for Casper WY.