Arco Idaho Climate Data

Monthly Average Climate Data for Arco Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January5.0 °F28.5 °F0.85 in.
February9.2 °F33.4 °F0.75 in.
March19.9 °F44.4 °F0.71 in.
April27.7 °F55.9 °F0.93 in.
May35.7 °F65.5 °F1.23 in.
June42.1 °F75.2 °F0.89 in.
July48.6 °F86.4 °F0.29 in.
August46.8 °F85.0 °F0.48 in.
September38.5 °F74.5 °F0.69 in.
October28.2 °F59.6 °F0.72 in.
November17.1 °F42.6 °F0.53 in.
December7.4 °F29.6 °F0.92 in.
Annual27.2 °F56.7 °F8.99 in.

Climate Data for Arco Idaho

Average First Frost DateSep.1 - Sep. 10
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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