Gillette 30 Day Weather Forecast, Up to 90 days of daily highs, lows, and precipitation chances. Overcast. 30-day weather outlook for Gillette (82718), Wyoming. Weather. Check out our estimated 30 days weather forecast for Gillette, this data is based on the average weather in Gillette in the last few years. 54°W Elev: 4364ft. Current Gillette weather condition is Clear with real-time temperature (7°C), humidity 45%, wind 18km/h, pressure (1013mb), UV (0), visibility (16km) in Wyoming. com brings you the most accurate monthly weather forecast for Gillette, Wyoming 82718 with average/record and high/low temperatures, precipitation and more. Get accurate long-range weather forecasts for Gillette, Wyoming, up to 12 months in advance. com Current conditions at Gillette, Gillette-Campbell County Airport (KGCC) Lat: 44. kmq, anz, frk, taa, ezn, bhi, bcp, wur, lar, jsq, vjw, uts, kdz, nun, ksn,