Orange County Climate
Orange County, California
Avg Annual Temp
65.3°F
Annual Precip
12.3"
Annual Snowfall
0.0"
Extreme Heat Days
28.825000000000003
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Orange County Weather
Consistently Warm and Sunny
Orange County’s 65.3°F annual average is much higher than the national median. It offers a classic semi-arid Mediterranean climate that stays warm year-round.
One of the Warmest in California
At 65.3°F, the county is significantly warmer than the state average of 58.7°F. It is also quite dry, receiving only 12.3 inches of rain compared to the 25.8-inch state average.
Drier and Warmer Than the North
Orange County is nearly 6 degrees warmer than Napa County on average. It receives less than half the rainfall of the northern wine country, emphasizing its Southern California desert-edge nature.
Perpetual Summer
Winters are exceptionally mild with a January average of 57.8°F and zero snow. Summers bring 29 days of heat above 90°F, concentrated mostly in the inland valleys.
Protect Against the Sun
Energy-efficient cooling and sun protection are vital for the 29 annual extreme heat days. With only 12.3 inches of rain, drought-tolerant landscaping is the standard for local homeowners.
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.