Costa Mesa, CA Weather

Costa Mesa, CA climate is mild during summer when temperatures tend to be in the 60's and cool during winter when temperatures tend to be in the 50's.

The warmest month of the year is August with an average maximum temperature of 73.00 degrees Fahrenheit, while the coldest month of the year is December with an average minimum temperature of 48.00 degrees Fahrenheit.

Temperature variations between night and day tend to be small during summer with a difference that can reach 8 degrees Fahrenheit, and fairly limited during winter with an average difference of 15 degrees Fahrenheit.

The annual average precipitation at Costa Mesa is 11.65 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is January with an average rainfall of 2.60 Inches.

Weather Data

Current Conditions

(Updated: 10:53 PM PST FRI NOV 21 2008)

Fog And Mist, 60°F	Humidity: 90%	Dewpoint: 57°F
	Wind Speed: CALM	Heat Index: 60°F
	Barometer: 29.99 in.	Wind Chill: 60°F

Weather Forecast

(Generated: 1:47 PM PST FRI NOV 21 2008)

		Tonight: Mostly clear in the evening...Becoming partly cloudy. Patchy fog overnight. Lows 53 to 59. Light winds.
	Lo: 57°F
	Hi: 80°F	Saturday: Mostly sunny. Patchy fog in the morning. Highs 70 to 75 near the coast to 77 to 82 inland. Light winds.
	Lo: 55°F
	Hi: 72°F	Sunday: Partly cloudy in the morning...Becoming mostly sunny. Patchy fog in the morning. Highs around 66 near the coast to 69 to 74 inland. Light winds.
	Lo: 54°F
	Hi: 71°F	Monday: Partly cloudy. Patchy fog in the morning. Highs around 65 near the coast to 68 to 73 inland.
	Lo: 55°F
	Hi: 71°F	Tuesday: Patchy fog in the morning. Partly cloudy with a slight chance of showers. Highs 63 to 68 near the coast to 68 to 73 inland.
	Lo: 56°F
	Hi: 69°F	Wednesday: Mostly cloudy in the morning...Becoming partly cloudy. Chance of showers. Highs 62 to 67 near the coast to 66 to 71 inland.
	Lo: 51°F
	Hi: 66°F	Thanksgiving day: Partly cloudy with a slight chance of showers. Highs 63 to 68.
	Lo: 52°F

Moon, Sunrise and Sunset

	Moon Phase: Waning Crescent Moon	Civil Twilight: 6:02 AM PST	Sunrise: 6:28 AM PST
		Sunset: 4:45 PM PST	Civil Twilight: 5:12 PM PST

Normal Climate

Normal Temperatures

(NEWPORT BEACH HARBOR Weather station, 3.58 miles from Costa Mesa)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	63.6	63.8	63.6	65.5	66.1	68.4	71.4	73.0	72.9	71.2	67.7	64.2	67.6
Mean °F	55.9	56.7	57.4	59.5	61.7	64.3	67.3	68.7	68.1	65.1	60.0	56.1	61.7
Min °F	48.2	49.6	51.2	53.5	57.3	60.2	63.1	64.4	63.2	59.0	52.2	48.0	55.8

Normal Precipitation