As of 04:54 PDT

Costa Mesa, CA weather in December

69°

Costa Mesa, Sunday, 9 August, 04:54

Mostly clear. Feels like 70°. High 97°, low 69°.

Pressure29.85 inHg

Wind3.2 mph SW

Humidity92%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

In December, Costa Mesa, CA averages a high of 63.1° and a low of 47°. About 2.0 inches of precipitation fall over the month (5 wet days). The record high is 84° (2017) and the record low 31.3° (1990). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	65.3°	48.2°	7%	79° (1976)	37.6° (2004)
2	65.3°	48.2°	8%	78.3° (1969)	39.7° (2004)
3	65.3°	49.1°	10%	76.1° (1989)	40.1° (1973)
4	64.9°	48.4°	10%	78.4° (1979)	39.2° (2011)
5	64.8°	48.4°	13%	83.5° (1979)	39.9° (1983)
6	64.8°	48.9°	15%	78.1° (1979)	40.5° (2011)
7	64.6°	49.1°	27%	77.9° (2017)	36° (1978)
8	64.6°	48.2°	13%	79° (1975)	34.7° (1978)
9	64.2°	47.7°	13%	81.7° (2017)	35.1° (1978)
10	64.4°	47.5°	7%	84° (2017)	39.4° (1998)
11	63.5°	48.4°	15%	75.4° (2017)	39° (1972)
12	62.8°	47.1°	13%	78.1° (2010)	34.7° (1972)
13	62.2°	46.8°	13%	71.4° (1969)	36.1° (1985)
14	62.8°	46°	12%	72.5° (1976)	35.2° (1967)
15	63.3°	46.2°	10%	76.8° (1976)	37.4° (1975)
16	63.9°	46.6°	20%	77.2° (1976)	38.5° (1971)
17	63.3°	46.8°	20%	75.6° (1998)	37.8° (1975)
18	62.6°	47.3°	20%	73° (2000)	37.6° (1968)
19	62.2°	46.8°	22%	73.4° (2004)	38.8° (2006)
20	61.9°	46°	17%	77.4° (1960)	36.9° (1978)
21	61.2°	46.4°	18%	74.1° (1960)	34° (1968)
22	61.7°	46.6°	18%	76.3° (1960)	34.3° (1990)
23	62.6°	46.4°	15%	76.3° (1989)	31.3° (1990)
24	63°	45.9°	18%	76.1° (1989)	32.5° (1998)
25	63.1°	46°	20%	77.2° (2013)	33.6° (1990)
26	61.7°	45.7°	17%	75.7° (2013)	33.6° (1987)
27	61.2°	45.5°	13%	75.9° (2013)	35.6° (1988)
28	61°	45.9°	23%	77° (1963)	35.8° (1987)
29	61.2°	46°	25%	78.6° (1963)	36° (1988)
30	61.3°	45.9°	18%	80.1° (1980)	33.4° (1982)
31	61.3°	46°	20%	74.8° (1963)	35.6° (1990)