National Weather Service Forecast for: Gillette WY
Issued by: National Weather Service Rapid City, SD
Updated: 3:32 am MDT Jun 22, 2026
 
Overnight

Overnight: Scattered showers. Mostly cloudy, with a steady temperature around 55. South wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Scattered
Showers

 Monday

Monday: Isolated showers, then a chance of showers and thunderstorms after 9am. Some of the storms could be severe. Partly sunny, with a high near 77. South wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%.
Severe
T-Storms

 Monday
Night
Monday Night: A 40 percent chance of showers and thunderstorms, mainly before 3am. Some of the storms could be severe. Mostly cloudy, with a low around 50. North wind around 9 mph, with gusts as high as 22 mph.
Severe
T-Storms

 Tuesday

Tuesday: Cloudy through mid morning, then gradual clearing, with a high near 70. North wind around 8 mph, with gusts as high as 20 mph.
Gradual
Clearing

 Tuesday
Night
Tuesday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 46. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Partly Cloudy
then Slight
Chance
Showers
 Wednesday

Wednesday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 71. Calm wind becoming northeast 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Showers
Likely then
Chance
T-storms
 Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 47. Chance of precipitation is 50%.
Chance
T-storms then
Chance
Showers
 Thursday

Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75.
Showers
Likely

 Thursday
Night
Thursday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50.
Chance
T-storms then
Partly Cloudy
Lo 55 °F Hi 77 °F Lo 50 °F Hi 70 °F Lo 46 °F Hi 71 °F Lo 47 °F Hi 75 °F Lo 50 °F

 

Overnight
 
 Scattered showers. Mostly cloudy, with a steady temperature around 55. South wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Monday
 
 Isolated showers, then a chance of showers and thunderstorms after 9am. Some of the storms could be severe. Partly sunny, with a high near 77. South wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%.
Monday Night
 
 A 40 percent chance of showers and thunderstorms, mainly before 3am. Some of the storms could be severe. Mostly cloudy, with a low around 50. North wind around 9 mph, with gusts as high as 22 mph.
Tuesday
 
 Cloudy through mid morning, then gradual clearing, with a high near 70. North wind around 8 mph, with gusts as high as 20 mph.
Tuesday Night
 
 A 20 percent chance of showers after midnight. Partly cloudy, with a low around 46. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Wednesday
 
 Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 71. Calm wind becoming northeast 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Wednesday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 47. Chance of precipitation is 50%.
Thursday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75.
Thursday Night
 
 A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50.
Friday
 
 Mostly sunny, with a high near 86.
Friday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57. Breezy.
Saturday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Saturday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Sunday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Gillette WY.