Olney Montana Climate Data

Monthly Average Climate Data for Olney Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.1 °F30.4 °F2.22 in.
February14.9 °F36.0 °F1.46 in.
March21.2 °F44.4 °F1.43 in.
April27.4 °F54.1 °F1.4 in.
May34.9 °F64.2 °F2.16 in.
June41.5 °F70.3 °F3.2 in.
July44.9 °F81.2 °F1.51 in.
August42.6 °F81.3 °F0.98 in.
September35.6 °F70.0 °F1.27 in.
October27.9 °F53.7 °F1.5 in.
November22.0 °F38.5 °F2.0 in.
December15.4 °F29.7 °F2.13 in.
Annual28.5 °F54.5 °F21.26 in.

Climate Data for Olney Montana

Average First Frost DateSep.1 - Sep. 10
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 4b : -25°F to -20°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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