(Gillette, Wyo.) According to the National Weather Service out of Rapid City, the high for today is 78°F with the low for tonight being 46°F. Mostly sunny with a south wind of 10 to 14 mph and gusts of 20 mph. Possible rain showers and thunderstorms after noon. Tonight partly cloudy with increasing winds of 14 to 21 mph with gusts up to 29 mph.