Roy Montana Climate Data

Monthly Average Climate Data for Roy Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.5 °F34.1 °F0.51 in.
February15.2 °F36.0 °F0.44 in.
March22.5 °F45.2 °F0.71 in.
April30.9 °F54.2 °F1.45 in.
May39.9 °F63.6 °F2.97 in.
June48.5 °F72.6 °F3.02 in.
July54.7 °F83.7 °F1.72 in.
August53.3 °F83.2 °F1.33 in.
September44.4 °F72.0 °F1.22 in.
October33.6 °F57.5 °F1.12 in.
November23.0 °F44.6 °F0.56 in.
December15.3 °F35.4 °F0.5 in.
Annual32.9 °F56.8 °F15.55 in.

Climate Data for Roy Montana

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year