Broadwater County Climate
Broadwater County, Montana
Avg Annual Temp
44.9°F
Annual Precip
10.6"
Annual Snowfall
23.7"
Extreme Heat Days
14.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Broadwater County Weather
Cool and Arid Western Character
Broadwater County averages 44.9°F annually, which is cooler than the national median. Its climate is defined by dry air and moderate northern temperatures.
Slightly Warmer Than State Norms
The county's 44.9°F average is roughly 1.2 degrees warmer than the Montana state average. While still cool, it avoids some of the more extreme cold found in the high mountains.
One of Montana's Driest Counties
Broadwater receives only 10.6 inches of precipitation annually, far below the state average of 15.4 inches. This makes it significantly more arid than its neighbor, Cascade County.
Manageable Winters and Dry Summers
Summer averages 64.7°F with 14 extreme heat days over 90°F. Winter remains relatively mild for Montana, averaging 25.1°F with 23.7 inches of annual snow.
Focus on Water Storage and Moderate HVAC
Given the very low 10.6 inches of rainfall, irrigation and water conservation are top priorities. Heating systems should be reliable, though snowfall is lighter than in many surrounding areas.
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.