New Castle Colorado Climate Data

Monthly Average Climate Data for New Castle Colorado

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.1 °C2.7 °C28.19 mm
February-8.1 °C5.8 °C28.7 mm
March-4 °C11.8 °C28.96 mm
April-0.7 °C15.9 °C39.12 mm
May3.3 °C21.3 °C40.64 mm
June7.6 °C27.9 °C20.57 mm
July11.6 °C31.2 °C26.67 mm
August10.6 °C29.7 °C28.96 mm
September5.8 °C25.2 °C42.16 mm
October-0.3 °C17.9 °C41.66 mm
November-5.7 °C9.9 °C27.69 mm
December-10.7 °C2.8 °C24.38 mm
Annual-0.1 °C16.8 °C377.7 mm

Climate Data for New Castle Colorado

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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