Heron Montana Climate Data

Monthly Average Climate Data for Heron Montana

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.9 °C1.2 °C104.9 mm
February-4.7 °C3.9 °C70.1 mm
March-2.6 °C8.4 °C80.77 mm
April0.2 °C13.4 °C57.66 mm
May3.9 °C19.1 °C65.02 mm
June7.4 °C22.3 °C69.34 mm
July9.5 °C27.9 °C27.69 mm
August8.9 °C28.1 °C23.88 mm
September5.3 °C22.1 °C37.08 mm
October1.4 °C13.2 °C75.69 mm
November-1.7 °C5.2 °C97.79 mm
December-4.9 °C0.9 °C104.9 mm
Annual1.5 °C13.8 °C814.82 mm

Climate Data for Heron Montana

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
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 ConditionsModerate Drought
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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