Rock Springs Wyoming Climate Data

Monthly Average Climate Data for Rock Springs Wyoming

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.8 °F32.7 °F0.6 in.
February13.6 °F35.9 °F0.51 in.
March22.5 °F46.3 °F0.72 in.
April28.9 °F55.3 °F1.11 in.
May37.1 °F64.8 °F1.94 in.
June45.1 °F76.5 °F0.85 in.
July52.0 °F85.2 °F0.64 in.
August50.4 °F83.1 °F0.59 in.
September41.5 °F73.7 °F1.04 in.
October31.4 °F59.1 °F1.03 in.
November20.8 °F43.9 °F0.63 in.
December11.6 °F32.6 °F0.49 in.
Annual30.6 °F57.4 °F10.15 in.

Climate Data for Rock Springs Wyoming

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate