Musselshell County Climate
Musselshell County, Montana
Avg Annual Temp
46.0°F
Annual Precip
15.2"
Annual Snowfall
36.8"
Extreme Heat Days
41.63333333333333
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Musselshell County Weather
A Cool Climate in Big Sky Country
The 46.0°F annual average in Musselshell County is nearly 8 degrees cooler than the national median of 54.4°F. This semi-arid climate defines the heart of the northern plains.
Warmer Than the Montana Average
Musselshell sits 2.3 degrees above the Montana state average of 43.7°F. It ranks as one of the warmer regions in a state known for its frigid winters.
Consistent Temperatures Across the Central Plains
Its 46.0°F average mirrors nearby Petroleum County but stays warmer than the mountain-chilled regions to the west. Precipitation levels of 15.2 inches align closely with the state's 15.4-inch norm.
Hot Summers and Moderate Snow
Residents face 42 extreme heat days reaching 90°F or higher during the 67.6°F summers. Winters average 25.5°F and bring a moderate 36.8 inches of annual snowfall.
Planning for Heat and Snow
High heat frequency requires robust air conditioning for the 71.0°F July peaks. Winter prep should include standard snow removal equipment for the 36.8 inches of annual accumulation.
Frequently Asked Questions
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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.