Casper Wyoming Climate Data

Monthly Average Climate Data for Casper Wyoming

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.8 °F37.7 °F0.55 in.
February17.7 °F39.4 °F0.71 in.
March24.9 °F49.7 °F1.09 in.
April30.8 °F57.0 °F1.84 in.
May39.7 °F66.8 °F2.74 in.
June48.5 °F79.4 °F1.44 in.
July55.8 °F88.5 °F1.17 in.
August53.6 °F86.8 °F0.94 in.
September43.8 °F76.2 °F1.17 in.
October33.1 °F60.9 °F1.44 in.
November23.9 °F47.4 °F0.69 in.
December17.1 °F37.6 °F0.66 in.
Annual33.8 °F60.6 °F14.44 in.

Climate Data for Casper Wyoming

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
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 ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year