Caribou County Climate
Caribou County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.0°F
Annual Precip
15.4"
Annual Snowfall
—
Extreme Heat Days
20
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,648
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Caribou County
Climate Verdict
Caribou County has a cool, averaging 43.0°F annually, semi-arid conditions with only 15.4 inches of annual precipitation, occasional hot days — 20.2 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.5°F. summers are pleasantly cool with July averaging 66.8°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Caribou County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Caribou County is 3.5°F cooler than the Idaho statewide average of 46.5°F.
Climate Profile
About Caribou County Weather
A High Altitude Rocky Mountain Climate
Caribou County's annual average temperature of 43.0°F is nearly 10 degrees below the national median. It receives a modest 15.4 inches of precipitation annually, typical for the high mountain basins.
Colder and Drier Than Idaho Benchmarks
Caribou County is 3.5 degrees colder than the Idaho state average of 46.5°F. Its 15.4 inches of precipitation is just under the state average of 17.0 inches.
Slightly Warmer Winters Than Butte County
Caribou County's winter average of 22.7°F is about three degrees warmer than Butte County. It shares a similar arid profile with Bonneville County, with both averaging around 15 inches of moisture.
Chilly Winters and Mild Summer Evenings
Winter temperatures average 22.7°F, while summer averages are a comfortable 63.7°F. Despite the cool average, the county still sees 20 days per year where temperatures reach 90°F.
Preparing for Thermal Swings and Dryness
The 20 days of extreme heat combined with cold 21.5°F Januarys require versatile HVAC systems. While snowfall data is limited, the winter averages suggest residents should be prepared for significant frost and ice.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.