Gillette Wyoming Climate Data

Monthly Average Climate Data for Gillette Wyoming

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.1 °C1.7 °C16.51 mm
February-9.2 °C2.7 °C18.8 mm
March-4.9 °C8.4 °C27.69 mm
April-0.9 °C12.8 °C57.91 mm
May4.3 °C17.9 °C77.98 mm
June9.4 °C24.6 °C62.23 mm
July13.3 °C29.9 °C47.75 mm
August12.5 °C29.5 °C30.48 mm
September7.2 °C23.8 °C31.5 mm
October0.6 °C15.1 °C38.86 mm
November-5.2 °C7.6 °C16 mm
December-9.6 °C2.2 °C22.86 mm
Annual0.6 °C14.7 °C448.57 mm

Climate Data for Gillette Wyoming

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 4b : -31.7°C to -28.9°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate