Monterey County Climate
Monterey County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.7°F
Annual Precip
19.9"
Annual Snowfall
0.0"
Extreme Heat Days
20
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
3,019
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Monterey County
Climate Verdict
Monterey County has a mild, with an average annual temperature of 57.7°F, semi-arid conditions with only 19.9 inches of annual precipitation, occasional hot days — 20.01111111111111 per year above 90°F, light snow averaging 0.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 51.0°F. summers are pleasantly cool with July averaging 64.2°F. The climate is remarkably stable year-round, with only a 13°F difference between January and July. December is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Monterey County closely matches the California statewide average temperature of 58.7°F, it is also noticeably drier, receiving 5.8 inches less precipitation than the state average, the county experiences 38.65981385182276 fewer extreme heat days than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.