Inyo County Climate
Inyo County, California
Avg Annual Temp
66.6°F
Annual Precip
7.7"
Annual Snowfall
0.0"
Extreme Heat Days
141.64
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Inyo County Weather
Dry and Warm High Desert
Inyo County’s 66.6°F annual average reflects a high-desert climate that is much warmer than the national median. With only 7.7 inches of rain, it is significantly drier than the average American county.
Above the California Median
The county averages 66.6°F, placing it well above the California state average of 58.7°F. This heat is driven by the extreme conditions of Death Valley, which sits within the county borders.
Hotter Than the High Sierras
Inyo is much hotter than neighboring Mono County to the north, which sits at higher Sierra elevations. It shares a dry, rugged basin profile with San Bernardino County to the south.
Long Hot Seasons, Cool Winters
Summer temperatures average 86.8°F with 142 days hitting 90°F or higher. Despite the heat, winters are cool at 47.3°F, and the valley floor typically sees no snowfall.
Plan for Arid Conditions
Residents must prepare for long stretches of triple-digit heat and intense solar exposure. High-performance HVAC and desert-hardy landscaping are essential for managing the 7.7 inches of annual moisture and 142 extreme heat days.
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.