Butte County Climate
Butte County, Idaho
Avg Annual Temp
42.5°F
Annual Precip
10.9"
Annual Snowfall
35.0"
Extreme Heat Days
23.06
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Butte County Weather
An Arid and High-Desert Climate
Butte County is significantly colder and drier than the national average, with an annual temp of 42.5°F and only 10.9 inches of rain. This environment reflects a harsh, high-desert ecosystem.
Colder and Drier than Idaho Averages
Butte County averages four degrees colder than the state average of 46.5°F. Its 10.9 inches of annual precipitation is far below the state average of 17.0 inches, marking it as a dry region.
Extreme Cold Compared to Southern Cassia
Butte's winter average of 19.7°F is much harsher than Cassia County's 30.0°F. While both are dry, Butte receives 35.0 inches of snow, nearly double Cassia's 18.5 inches.
Harsh Winters and Hot Summer Days
The county experiences extreme seasonal shifts, from a bitter 18.0°F average in January to 23 days of heat over 90°F. Winter is defined by 35.0 inches of snow and a low December-February average of 19.7°F.
Water Conservation and Winter Insulation
Given the low 10.9 inches of precipitation, xeriscaping and water conservation are practical for local homeowners. High-efficiency furnaces are critical for surviving the sub-20°F winter averages.
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.