Get the monthly weather forecast for Costa Mesa, CA, including daily high/low, historical averages, to help you plan ahead.

In Costa Mesa during August average daily high temperatures are level around 78°F and it is overcast or mostly cloudy about 10% of the time.

Get the monthly weather forecast for Costa Mesa Country Club, CA, including daily high/low, historical averages, to help you plan ahead.

The weather in Costa Mesa in August is pleasantly warm and humid but cool, with average highs of 82°F (28°C) and lows of 65°F (19°C).

August weather forecast in Costa Mesa · 1 August. Thursday. +23°. +20° · 2 August. Friday. +23°. +20° · 3 August. Saturday. +22°. +19° · 4 August. Sunday. +22°. +19 ...

August Weather Averages for Costa Mesa ; High Temp, 26°C · 79°F ; Low Temp, 20°C · 67°F ; Avg Temp, 23°C · 73°F ; Sunshine Hours, 348 hours ; Rainfall, 5.52 mm, 0.22 In.

The warm season lasts for 2.8 months, from July 10 to October 3, with an average daily high temperature above 76°F. The hottest month of the year in Costa Mesa ...

Check accurate weather in August in Costa Mesa (CA). Expect Costa Mesa August temperature around 27°C (80°F). Read clothing tips & recommended activities.

Costa Mesa weather in August ; Temperature August, 21.7°C | 71°F ; Temperature August max. 26.5°C | 79.8°F ; Temperature August min. 18.1°C | 64.5°F ; Precipitation ...

Partly cloudy skies. Low 47F. Winds light and variable. Record Low38°.