Boundary County Climate
Boundary County, Idaho
Avg Annual Temp
47.5°F
Annual Precip
21.3"
Annual Snowfall
53.8"
Extreme Heat Days
20.45
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Boundary County Weather
Moderate Temperatures on the Canadian Border
Boundary County averages 47.5°F annually, which is surprisingly mild for its northern latitude compared to the national median. It receives 21.3 inches of precipitation, making it more humid than the typical Western interior.
Above Idaho's Average Annual Temperature
The county's annual average of 47.5°F is higher than the Idaho state average of 46.5°F. It also receives 4.3 inches more precipitation than the typical Idaho county.
Drier and Warmer Than Bonner County
Boundary County is notably drier than its neighbor Bonner, receiving 21.3 inches of precipitation compared to Bonner's 32.4. It also enjoys a warmer July average of 68.9°F versus Bonner's 66.1°F.
Crisp Winters and Brief Heat Waves
The county sees 53.8 inches of snow annually, with winter temperatures averaging 29.4°F. Summer peaks in July at 68.9°F, and residents should expect about 20 days per year over 90°F.
Year-Round Outdoor Planning Essentials
While snowfall is moderate for Idaho at 53.8 inches, residents should still prioritize reliable heating systems. The 20 extreme heat days mean that while summers are mild, cooling solutions are becoming increasingly relevant.
Frequently Asked Questions
What is the average temperature in Boundary County?
How much rain does Boundary County get?
Does it snow in Boundary County?
How hot does Boundary County get in summer?
How cold are winters in Boundary County?
Track your own weather in Boundary 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.