Heron Montana Climate Data

Monthly Average Climate Data for Heron Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.1 °F34.1 °F4.13 in.
February23.5 °F39.0 °F2.76 in.
March27.3 °F47.1 °F3.18 in.
April32.3 °F56.2 °F2.27 in.
May39.1 °F66.4 °F2.56 in.
June45.3 °F72.1 °F2.73 in.
July49.1 °F82.3 °F1.09 in.
August48.0 °F82.6 °F0.94 in.
September41.5 °F71.8 °F1.46 in.
October34.5 °F55.8 °F2.98 in.
November29.0 °F41.4 °F3.85 in.
December23.2 °F33.6 °F4.13 in.
Annual34.7 °F56.9 °F32.08 in.

Climate Data for Heron Montana

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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