Casper Wyoming Climate Data

Monthly Average Climate Data for Casper Wyoming

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.4 °C3.2 °C13.97 mm
February-7.9 °C4.1 °C18.03 mm
March-3.9 °C9.8 °C27.69 mm
April-0.7 °C13.9 °C46.74 mm
May4.3 °C19.3 °C69.6 mm
June9.2 °C26.3 °C36.58 mm
July13.2 °C31.4 °C29.72 mm
August12 °C30.4 °C23.88 mm
September6.6 °C24.6 °C29.72 mm
October0.6 °C16.1 °C36.58 mm
November-4.5 °C8.6 °C17.53 mm
December-8.3 °C3.1 °C16.76 mm
Annual1 °C15.9 °C366.8 mm

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 : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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