National Weather Service Forecast for: Gillette WY
Issued by: National Weather Service Rapid City, SD
Updated: 12:37 pm MDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 79. Southwest wind 13 to 15 mph becoming northwest. Winds could gust as high as 23 mph.
Sunny


 Tonight

Tonight: Mostly clear, with a low around 44. Northwest wind 5 to 10 mph becoming light west. Winds could gust as high as 20 mph.
Mostly Clear


 Friday

Friday: Sunny, with a high near 81. West wind 6 to 16 mph, with gusts as high as 22 mph.
Sunny


 Friday
Night
Friday Night: Partly cloudy, with a low around 50. West wind 6 to 14 mph becoming southwest in the evening. Winds could gust as high as 20 mph.
Partly Cloudy


 Saturday

Saturday: Mostly sunny, with a high near 85. Breezy, with a southwest wind 10 to 15 mph becoming northwest 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.
Mostly Sunny
then Mostly
Sunny and
Breezy
 Saturday
Night
Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 40. Breezy, with a north wind 14 to 23 mph, with gusts as high as 31 mph.
Mostly Cloudy
and Breezy
then Slight
Chance
Showers
 Sunday

Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 56. North wind 8 to 13 mph.
Decreasing
Clouds

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 32. North wind 8 to 10 mph becoming south after midnight. Winds could gust as high as 18 mph.
Partly Cloudy


 Monday

Monday: Partly sunny, with a high near 63.
Partly Sunny
Hi 79 °F Lo 44 °F Hi 81 °F Lo 50 °F Hi 85 °F Lo 40 °F Hi 56 °F Lo 32 °F Hi 63 °F

Hazardous Weather Outlook
Red Flag Warning
 

This Afternoon
 
 Sunny, with a high near 79. Southwest wind 13 to 15 mph becoming northwest. Winds could gust as high as 23 mph.
Tonight
 
 Mostly clear, with a low around 44. Northwest wind 5 to 10 mph becoming light west. Winds could gust as high as 20 mph.
Friday
 
 Sunny, with a high near 81. West wind 6 to 16 mph, with gusts as high as 22 mph.
Friday Night
 
 Partly cloudy, with a low around 50. West wind 6 to 14 mph becoming southwest in the evening. Winds could gust as high as 20 mph.
Saturday
 
 Mostly sunny, with a high near 85. Breezy, with a southwest wind 10 to 15 mph becoming northwest 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.
Saturday Night
 
 A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 40. Breezy, with a north wind 14 to 23 mph, with gusts as high as 31 mph.
Sunday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 56. North wind 8 to 13 mph.
Sunday Night
 
 Partly cloudy, with a low around 32. North wind 8 to 10 mph becoming south after midnight. Winds could gust as high as 18 mph.
Monday
 
 Partly sunny, with a high near 63.
Monday Night
 
 Mostly cloudy, with a low around 37.
Tuesday
 
 Partly sunny, with a high near 69.
Tuesday Night
 
 Mostly cloudy, with a low around 48.
Wednesday
 
 Partly sunny, with a high near 75. Breezy.

 

Forecast from NOAA-NWS for Gillette WY.