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Climate & Weather Averages in Costa Mesa, California, USA

Currently: 65 °F. Passing clouds. (Weather station: John Wayne Airport-Orange County Airport, USA). See more current weather

Annual Weather Averages in Costa Mesa

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Costa Mesa

High Temp: 82 °F

Low Temp: 48 °F

Mean Temp: 65 °F

Precipitation: 0.95"

Humidity: 65%

Dew Point: 52 °F

Wind: 8 mph

Pressure: 29.98 "Hg

Visibility: 9 mi

January Climate & Weather Averages in Costa Mesa

High Temp: 68 °F

Low Temp: 48 °F

Mean Temp: 58 °F

Precipitation: 2.59"

Humidity: 63%

Dew Point: 44 °F

Wind: 6 mph

Pressure: 30.08 "Hg

Visibility: 10 mi

February Climate & Weather Averages in Costa Mesa

High Temp: 67 °F

Low Temp: 49 °F

Mean Temp: 58 °F

Precipitation: 2.69"

Humidity: 64%

Dew Point: 45 °F

Wind: 7 mph

Pressure: 30.05 "Hg

Visibility: 10 mi

March Climate & Weather Averages in Costa Mesa

High Temp: 69 °F

Low Temp: 52 °F

Mean Temp: 60 °F

Precipitation: 1.46"

Humidity: 66%

Dew Point: 48 °F

Wind: 8 mph

Pressure: 30.03 "Hg

Visibility: 10 mi

April Climate & Weather Averages in Costa Mesa

High Temp: 71 °F

Low Temp: 55 °F

Mean Temp: 63 °F

Precipitation: 0.55"

Humidity: 64%

Dew Point: 50 °F

Wind: 10 mph

Pressure: 29.98 "Hg

Visibility: 10 mi

May Climate & Weather Averages in Costa Mesa

High Temp: 72 °F

Low Temp: 59 °F

Mean Temp: 65 °F

Precipitation: 0.27"

Humidity: 67%

Dew Point: 54 °F

Wind: 10 mph

Pressure: 29.94 "Hg

Visibility: 10 mi

June Climate & Weather Averages in Costa Mesa

High Temp: 75 °F

Low Temp: 62 °F

Mean Temp: 69 °F

Precipitation: 0.09"

Humidity: 68%

Dew Point: 57 °F

Wind: 11 mph

Pressure: 29.90 "Hg

Visibility: 9 mi

July Climate & Weather Averages in Costa Mesa

High Temp: 80 °F

Low Temp: 65 °F

Mean Temp: 72 °F

Precipitation: 0.08"

Humidity: 68%

Dew Point: 61 °F

Wind: 11 mph

Pressure: 29.92 "Hg

Visibility: 9 mi

August Climate & Weather Averages in Costa Mesa

High Temp: 82 °F

Low Temp: 66 °F

Mean Temp: 74 °F

Precipitation: 0.01"

Humidity: 67%

Dew Point: 62 °F

Wind: 10 mph

Pressure: 29.90 "Hg

Visibility: 9 mi

September Climate & Weather Averages in Costa Mesa

High Temp: 81 °F

Low Temp: 65 °F

Mean Temp: 73 °F

Precipitation: 0.15"

Humidity: 66%

Dew Point: 60 °F

Wind: 8 mph

Pressure: 29.88 "Hg

Visibility: 9 mi

October Climate & Weather Averages in Costa Mesa

High Temp: 77 °F

Low Temp: 60 °F

Mean Temp: 69 °F

Precipitation: 0.59"

Humidity: 64%

Dew Point: 55 °F

Wind: 7 mph

Pressure: 29.94 "Hg

Visibility: 9 mi

November Climate & Weather Averages in Costa Mesa

High Temp: 73 °F

Low Temp: 53 °F

Mean Temp: 63 °F

Precipitation: 0.82"

Humidity: 61%

Dew Point: 48 °F

Wind: 5 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Costa Mesa

High Temp: 67 °F

Low Temp: 48 °F

Mean Temp: 57 °F

Precipitation: 2.15"

Humidity: 62%

Dew Point: 43 °F

Wind: 5 mph

Pressure: 30.08 "Hg

Visibility: 10 mi

Quick Climate Info

Hottest MonthAugust (74 °F avg)
Coldest MonthDecember (57 °F avg)
Wettest MonthFebruary (2.69" avg)
Windiest MonthJune (11 mph avg)
Annual precip.11.44" (per year)

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