Stillwater County Climate
Stillwater County, Montana
Avg Annual Temp
44.0°F
Annual Precip
18.7"
Annual Snowfall
87.3"
Extreme Heat Days
19.45
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Stillwater County Weather
Average Temperatures, Extraordinary Snowfall
Stillwater County’s 44.0°F annual average is typical for the region, but its moisture patterns are unique. The county faces a heavy seasonal snow load compared to much of the United States.
Matching the Montana Temperature Baseline
Stillwater’s 44.0°F annual average is nearly identical to the Montana state average of 43.7°F. However, its 18.7 inches of precipitation makes it wetter than many other parts of the state.
A Regional Leader in Heavy Snow
While neighboring counties might see moderate totals, Stillwater gets buried under 87.3 inches of annual snowfall. This is nearly triple the snowfall seen in eastern Montana counties like Richland.
Mountain Winters and Gentle Summers
July averages a pleasant 65.9°F, while winter is defined by the massive 87.3-inch snow total. January temperatures stay relatively mild for the state at 26.1°F, despite the heavy precipitation.
Serious Snow Prep is Mandatory
With over 87 inches of snow per year, residents need professional-grade snow blowers and structural roof considerations. While 19 days of extreme heat occur, the primary planning focus should remain on winter moisture management.
Frequently Asked Questions
What is the average temperature in Stillwater County?
How much rain does Stillwater County get?
Does it snow in Stillwater County?
How hot does Stillwater County get in summer?
How cold are winters in Stillwater County?
Track your own weather in Stillwater County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.