Winston Montana Climate Data

Monthly Average Climate Data for Winston Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.9 °F34.2 °F0.43 in.
February16.5 °F37.3 °F0.38 in.
March23.1 °F46.2 °F0.67 in.
April30.1 °F54.8 °F1.35 in.
May38.3 °F63.9 °F2.1 in.
June45.4 °F72.3 °F2.52 in.
July51.3 °F82.9 °F1.28 in.
August49.4 °F82.3 °F1.13 in.
September42.2 °F71.6 °F1.1 in.
October32.4 °F57.1 °F0.91 in.
November22.9 °F42.5 °F0.6 in.
December15.4 °F33.7 °F0.48 in.
Annual31.8 °F56.6 °F12.95 in.

Climate Data for Winston 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 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year