Canyon County Climate
Canyon County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.0°F
Annual Precip
10.3"
Annual Snowfall
10.6"
Extreme Heat Days
52
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,954
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Canyon County
Climate Verdict
Canyon County has a mild, with an average annual temperature of 52.0°F, arid conditions receiving just 10.3 inches of precipitation annually, occasional hot days — 52.4 per year above 90°F, light snow averaging 10.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.1°F. summers are warm — July averages 74.9°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Canyon County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Canyon County is 5.5°F warmer than the Idaho statewide average of 46.5°F, it is also noticeably drier, receiving 6.7 inches less precipitation than the state average, the county experiences 22.20501581751581 more extreme heat days than the state average.
Climate Profile
About Canyon County Weather
Hot Summers and Low Annual Precipitation
Canyon County averages 52.0°F annually, which is closer to the national median than its neighbors. However, its 10.3 inches of precipitation makes it one of the driest inhabited areas in the United States.
Warmer and Drier Than the Idaho Average
Canyon County is one of the state's warmest spots, with an annual average 5.5 degrees higher than the state mean. It is also significantly drier, receiving 10.3 inches of moisture vs the state's 17.0.
The Heat Leader in Southern Idaho
Canyon County far exceeds the heat found in Cassia County, recording 52 extreme heat days compared to Cassia's 33. It is also much less snowy, with only 10.6 inches annually.
A Long and Hot Summer Season
July averages a warm 74.9°F, but the real story is the 52 days of heat exceeding 90°F. Winters are the mildest in the region, with an average of 33.0°F and only 10.6 inches of snow.
Investment in Cooling and Irrigation
High-efficiency HVAC systems are a priority for the nearly two months of 90°F heat. With only 10.3 inches of rain, underground irrigation is vital for any landscaping or gardening.
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.