Oneida County Climate
Oneida County, Idaho
Avg Annual Temp
46.8°F
Annual Precip
13.1"
Annual Snowfall
—
Extreme Heat Days
45.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Oneida County Weather
Standard Semi-Arid Basin Climate
Oneida averages 46.8°F, placing it squarely in a cool, semi-arid national category. Annual precipitation of 13.1 inches is well below the national median.
Matching the Idaho Average
The county's annual temperature of 46.8°F mirrors the Idaho state average of 46.5°F almost perfectly. It serves as a benchmark for the typical high-desert climate of Southern Idaho.
Typical Southern Border Weather
Like neighboring Franklin and Power, the county experiences low precipitation compared to the state average of 17 inches. Its climate is dictated by rugged basin and range geography.
Significant Summer Heat Frequency
Despite the moderate average, the county sees a surprising 46 days above 90°F in summer. Winters are sharp and cold, with January temperatures averaging just 23.6°F.
Prepare for Seasonal Extremes
Residents should prepare for swings between the 71°F July average and frozen winters. Though snowfall records are limited, dual-stage HVAC systems help manage the frequent summer heat.
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.