Monterey County Climate
Monterey County, California
Avg Annual Temp
57.7°F
Annual Precip
19.9"
Annual Snowfall
0.0"
Extreme Heat Days
20.01111111111111
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Monterey County Weather
Mild Coastal Living
Monterey County’s annual average of 57.7°F sits slightly above the national median. The Pacific influence creates a steady, temperate environment that avoids the extremes found inland.
Matching the California Standard
The county’s average temperature nearly mirrors the statewide average of 58.7°F. Its 19.9 inches of annual rainfall is slightly below the state norm of 25.8 inches, reflecting its central coast geography.
Cooler Than the Inland Valleys
Monterey stays cooler than neighbors like Napa County, which averages 59.5°F. This is primarily due to the marine layer that keeps July averages at a modest 64.2°F.
No Snow and Limited Heat
Snow is non-existent here, and winters remain mild with a January average of 51.0°F. The county only sees about 20 extreme heat days per year, mostly in the inland canyons.
Layering for the Marine Layer
The coastal fog makes layered clothing essential even in the height of summer. Because rainfall is limited to 19.9 inches, water-efficient landscaping is a common local priority.
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.