Canyon County Climate
Canyon County, Idaho
Avg Annual Temp
52.0°F
Annual Precip
10.3"
Annual Snowfall
10.6"
Extreme Heat Days
52.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.