Gillette Wyoming Climate Data

Monthly Average Climate Data for Gillette Wyoming

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.8 °F35.1 °F0.65 in.
February15.4 °F36.8 °F0.74 in.
March23.2 °F47.2 °F1.09 in.
April30.4 °F55.1 °F2.28 in.
May39.7 °F64.2 °F3.07 in.
June49.0 °F76.2 °F2.45 in.
July55.9 °F85.9 °F1.88 in.
August54.5 °F85.1 °F1.2 in.
September44.9 °F74.8 °F1.24 in.
October33.1 °F59.1 °F1.53 in.
November22.6 °F45.6 °F0.63 in.
December14.8 °F35.9 °F0.9 in.
Annual33.1 °F58.4 °F17.66 in.

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 : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate