New Castle Colorado Climate Data

Monthly Average Climate Data for New Castle Colorado

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.0 °F36.9 °F1.11 in.
February17.5 °F42.5 °F1.13 in.
March24.8 °F53.3 °F1.14 in.
April30.7 °F60.6 °F1.54 in.
May38.0 °F70.4 °F1.6 in.
June45.7 °F82.2 °F0.81 in.
July52.8 °F88.2 °F1.05 in.
August51.1 °F85.5 °F1.14 in.
September42.4 °F77.4 °F1.66 in.
October31.4 °F64.2 °F1.64 in.
November21.8 °F49.8 °F1.09 in.
December12.8 °F37.0 °F0.96 in.
Annual31.8 °F62.3 °F14.87 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year