Caldwell Idaho Climate Data

Monthly Average Climate Data for Caldwell Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.8 °F38.1 °F1.6 in.
February26.8 °F46.2 °F0.96 in.
March32.2 °F56.7 °F1.17 in.
April36.9 °F64.0 °F1.09 in.
May45.2 °F73.2 °F1.18 in.
June51.9 °F81.7 °F0.64 in.
July58.4 °F92.3 °F0.27 in.
August56.2 °F91.0 °F0.19 in.
September47.4 °F80.6 °F0.43 in.
October37.2 °F66.0 °F0.77 in.
November28.9 °F49.4 °F0.99 in.
December23.8 °F38.8 °F1.69 in.
Annual39.1 °F64.8 °F10.98 in.

Climate Data for Caldwell Idaho

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate