Hill County Climate
Hill County, Montana
Avg Annual Temp
42.1°F
Annual Precip
11.5"
Annual Snowfall
30.3"
Extreme Heat Days
25.08
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hill County Weather
Cold and exceptionally dry northern plains
Hill County is one of the drier spots in the U.S., receiving just 11.5 inches of precipitation annually. Its average annual temperature of 42.1°F is significantly lower than the national median.
Cooler than the Montana state norm
At 42.1°F, Hill County sits below the state average of 43.7°F. Its location on the northern border subjects it to more frequent arctic blasts than the central or southern counties.
Warmer than Glacier, colder than Garfield
Hill County is warmer than Glacier County to its west (39.9°F) but significantly cooler than Garfield County (44.9°F). It experiences a more continental climate than its neighbors.
Frigid winters and 25 hot days
January is particularly harsh with an average temperature of just 16.6°F and 30.3 inches of snow. Conversely, summers bring 25 days of heat over 90°F, with July averaging 67.9°F.
Insulate for deep winter freezes
The 16.6°F January average requires high-performance home insulation and reliable heating sources. Residents should also plan for water conservation given the very low 11.5 inches of annual rainfall.
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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.