Helmville Montana Climate Data

Monthly Average Climate Data for Helmville Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.5 °F31.5 °F1.0 in.
February12.0 °F35.9 °F0.85 in.
March19.3 °F44.9 °F0.68 in.
April26.1 °F53.8 °F1.04 in.
May33.0 °F63.8 °F1.72 in.
June39.5 °F71.1 °F2.2 in.
July43.3 °F82.2 °F0.95 in.
August41.5 °F81.8 °F0.96 in.
September34.5 °F71.2 °F1.11 in.
October26.1 °F55.5 °F1.07 in.
November18.2 °F40.3 °F1.15 in.
December10.8 °F30.8 °F1.09 in.
Annual26.2 °F55.2 °F13.82 in.

Climate Data for Helmville Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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