Mullan Idaho Climate Data

Monthly Average Climate Data for Mullan Idaho

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.4 °C1.1 °C99.57 mm
February-5.5 °C3 °C98.04 mm
March-3.6 °C7.4 °C102.36 mm
April-0.6 °C11.4 °C73.91 mm
May2.9 °C17.2 °C72.9 mm
June6.3 °C20.9 °C79.25 mm
July8.6 °C26.8 °C26.92 mm
August8.2 °C26.8 °C26.42 mm
September4.7 °C21.1 °C39.12 mm
October0.6 °C12.3 °C88.39 mm
November-2.9 °C4.4 °C115.06 mm
December-5.8 °C0.2 °C118.87 mm
Annual0.6 °C12.7 °C940.81 mm

Climate Data for Mullan 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 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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