Eureka Montana Climate Data

Monthly Average Climate Data for Eureka Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.7 °F31.5 °F1.05 in.
February18.8 °F37.8 °F0.79 in.
March24.9 °F47.4 °F0.93 in.
April30.8 °F57.3 °F1.07 in.
May38.5 °F67.8 °F1.8 in.
June45.2 °F74.1 °F2.57 in.
July49.7 °F84.8 °F1.25 in.
August47.9 °F84.8 °F0.99 in.
September40.2 °F73.4 °F1.26 in.
October32.1 °F56.6 °F1.28 in.
November25.8 °F40.2 °F1.33 in.
December18.8 °F30.8 °F1.19 in.
Annual32.5 °F57.2 °F15.51 in.

Climate Data for Eureka Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year