Caldwell Idaho Climate Data

Monthly Average Climate Data for Caldwell Idaho

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.6 °C3.4 °C40.64 mm
February-2.9 °C7.9 °C24.38 mm
March0.1 °C13.7 °C29.72 mm
April2.7 °C17.8 °C27.69 mm
May7.3 °C22.9 °C29.97 mm
June11.1 °C27.6 °C16.26 mm
July14.7 °C33.5 °C6.86 mm
August13.4 °C32.8 °C4.83 mm
September8.6 °C27 °C10.92 mm
October2.9 °C18.9 °C19.56 mm
November-1.7 °C9.7 °C25.15 mm
December-4.6 °C3.8 °C42.93 mm
Annual3.9 °C18.3 °C278.91 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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