Basalt Idaho Climate Data

Monthly Average Climate Data for Basalt Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.7 °F30.4 °F0.88 in.
February16.7 °F35.3 °F0.62 in.
March25.8 °F47.7 °F0.95 in.
April31.0 °F57.5 °F1.07 in.
May38.7 °F66.8 °F1.56 in.
June45.2 °F75.5 °F1.12 in.
July50.7 °F86.0 °F0.49 in.
August49.1 °F85.7 °F0.6 in.
September41.5 °F75.3 °F0.94 in.
October31.8 °F60.4 °F1.04 in.
November22.6 °F44.2 °F0.71 in.
December14.5 °F31.5 °F0.8 in.
Annual31.8 °F58 °F10.78 in.

Climate Data for Basalt Idaho

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2024 plantmaps.com