National Weather Service Forecast for: Evanston WY
Issued by: National Weather Service Salt Lake City, UT
Updated: 12:31 am MDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a low around 51. Light southeast wind.
Mostly Clear

 Thursday

Thursday: A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 89. Light and variable wind becoming west southwest 5 to 10 mph in the morning.
Sunny then
Chance
T-storms
 Thursday
Night
Thursday Night: Mostly clear, with a low around 53. West wind 5 to 8 mph becoming south southeast after midnight.
Mostly Clear

 Friday

Friday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. Light and variable wind becoming west southwest 5 to 8 mph in the morning.
Mostly Sunny
then Slight
Chance
T-storms
 Friday
Night
Friday Night: A slight chance of showers and thunderstorms before 9pm, then a chance of showers after midnight. Mostly cloudy, with a low around 56. South wind 3 to 7 mph. Chance of precipitation is 30%.
Slight Chance
T-storms then
Chance
Showers
 Saturday

Saturday: Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Mostly Cloudy
then Showers
Likely
 Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 52.
Chance
T-storms

 Sunday

Sunday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Mostly Sunny
then Slight
Chance
T-storms
 Sunday
Night
Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 50.
Slight Chance
T-storms then
Chance
Showers
Lo 51 °F Hi 89 °F Lo 53 °F Hi 89 °F Lo 56 °F Hi 84 °F Lo 52 °F Hi 82 °F Lo 50 °F

 

Overnight
 
 Mostly clear, with a low around 51. Light southeast wind.
Thursday
 
 A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Mostly sunny, with a high near 89. Light and variable wind becoming west southwest 5 to 10 mph in the morning.
Thursday Night
 
 Mostly clear, with a low around 53. West wind 5 to 8 mph becoming south southeast after midnight.
Friday
 
 A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. Light and variable wind becoming west southwest 5 to 8 mph in the morning.
Friday Night
 
 A slight chance of showers and thunderstorms before 9pm, then a chance of showers after midnight. Mostly cloudy, with a low around 56. South wind 3 to 7 mph. Chance of precipitation is 30%.
Saturday
 
 Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 52.
Sunday
 
 A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Sunday Night
 
 A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 50.
Monday
 
 A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
Monday Night
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Tuesday
 
 Mostly sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 49.
Wednesday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Evanston WY.