Placer County Climate
Placer County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
54.1°F
Annual Precip
48.0"
Annual Snowfall
62.9"
Extreme Heat Days
33
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
3,120
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Placer County
Climate Verdict
Placer County has a mild, with an average annual temperature of 54.1°F, moderately wet with 48.0 inches of annual precipitation, occasional hot days — 32.575 per year above 90°F, heavy winter snowfall averaging 62.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 40.9°F. summers are warm — July averages 71.9°F. The 31°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Placer County is 4.5°F cooler than the California statewide average of 58.7°F, it is also noticeably wetter, receiving 22.2 inches more precipitation than the state average, the county experiences 26.09592496293387 fewer extreme heat days than the state average.
Climate Profile
About Placer County Weather
A High-Precipitation Hub
Placer County’s average temperature of 54.1°F aligns with the national median. However, its 48.0 inches of annual precipitation makes it much wetter than most of the United States.
California's Wet Northern Interior
Placer receives nearly double the state's average rainfall of 25.8 inches. While its 54.1°F average is cooler than the state mean, it bridges the gap between the hot valley and cold peaks.
Wetter Than Neighbors
Placer is significantly wetter than Plumas County (36.1 inches) and Nevada County (40.4 inches). It serves as a major watershed for the region due to this high annual precipitation.
Snow and Heat in Equal Measure
The county faces 62.9 inches of annual snow in the mountains, yet sees 33 days of extreme heat in the lower elevations. This diversity creates a 69.2°F summer and 40.9°F winter average.
Dual-Season Home Preparation
Homeowners must prepare for both heavy mountain snow and valley heatwaves reaching over 90°F. Reliable drainage systems are critical to manage the 48.0 inches of annual rainfall.
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.