National Weather Service Forecast for: Gillette WY
Issued by: National Weather Service Rapid City, SD
Updated: 8:07 pm MDT Jun 18, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 46. North wind 5 to 8 mph becoming west after midnight. Winds could gust as high as 21 mph.
Partly Cloudy

 Juneteenth

Juneteenth: Sunny, with a high near 75. Northwest wind 6 to 9 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.
Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 50. Northeast wind 8 to 16 mph becoming southeast after midnight. Winds could gust as high as 26 mph.
Partly Cloudy

 Saturday

Saturday: Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 84. Breezy, with a southeast wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Mostly Cloudy
and Breezy
then Showers
Likely
 Saturday
Night
Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Southeast wind 11 to 16 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Showers
Likely

 Sunday

Sunday: Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then showers and possibly a thunderstorm after noon. High near 73. West wind 7 to 12 mph becoming north 13 to 18 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Showers

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 46. Chance of precipitation is 50%.
Chance
T-storms then
Chance
Showers
 Monday

Monday: Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 70.
Showers
Likely

 Monday
Night
Monday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Chance
T-storms then
Mostly Clear
Lo 46 °F Hi 75 °F Lo 50 °F Hi 84 °F Lo 50 °F Hi 73 °F Lo 46 °F Hi 70 °F Lo 43 °F

 

Tonight
 
 Partly cloudy, with a low around 46. North wind 5 to 8 mph becoming west after midnight. Winds could gust as high as 21 mph.
Juneteenth
 
 Sunny, with a high near 75. Northwest wind 6 to 9 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.
Friday Night
 
 Partly cloudy, with a low around 50. Northeast wind 8 to 16 mph becoming southeast after midnight. Winds could gust as high as 26 mph.
Saturday
 
 Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 84. Breezy, with a southeast wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Saturday Night
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Southeast wind 11 to 16 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Sunday
 
 Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then showers and possibly a thunderstorm after noon. High near 73. West wind 7 to 12 mph becoming north 13 to 18 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Sunday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 46. Chance of precipitation is 50%.
Monday
 
 Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 70.
Monday Night
 
 A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Tuesday
 
 Sunny, with a high near 72.
Tuesday Night
 
 Mostly clear, with a low around 46.
Wednesday
 
 A slight chance of showers and thunderstorms. Sunny, with a high near 78.
Wednesday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 50.
Thursday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Gillette WY.