Irwin Idaho Climate Data

Monthly Average Climate Data for Irwin Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.6 °F29.8 °F1.84 in.
February15.4 °F33.7 °F1.27 in.
March23.1 °F44.1 °F1.54 in.
April30.0 °F54.1 °F1.85 in.
May37.8 °F64.5 °F2.44 in.
June44.5 °F73.6 °F2.09 in.
July50.5 °F83.9 °F1.13 in.
August49.3 °F83.1 °F1.17 in.
September41.6 °F73.4 °F1.59 in.
October32.8 °F58.6 °F1.71 in.
November23.4 °F42.3 °F1.62 in.
December15.2 °F30.3 °F1.47 in.
Annual31.4 °F56 °F19.72 in.

Climate Data for Irwin 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 5a : -20°F to -15°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
2024 plantmaps.com