As of 08:42 PDT

Rossmoor, CA weather in December

74°

Rossmoor, Sunday, 9 August, 08:42

Mostly clear. Feels like 75°. High 96°, low 73°.

Pressure29.88 inHg

Wind5 mph W

Humidity85%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

In December, Rossmoor, CA averages a high of 64.2° and a low of 45.8°. About 2.0 inches of precipitation fall over the month (5 wet days). The record high is 85.8° (1979) and the record low 29.5° (1990). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	66.7°	46.9°	7%	80.6° (1976)	35.2° (2004)
2	66.6°	46.9°	8%	79.2° (1993)	37° (2004)
3	66.6°	47.8°	10%	77.5° (1989)	37.9° (1973)
4	66°	46.9°	12%	80.6° (1979)	37.4° (2011)
5	65.7°	47.3°	13%	85.8° (1979)	37.8° (1983)
6	65.8°	47.8°	15%	80.1° (1990)	37.6° (2011)
7	65.7°	48°	23%	78.1° (2017)	33.6° (1978)
8	65.7°	46.8°	13%	82.2° (1975)	32.4° (1978)
9	65.3°	46.8°	12%	85.1° (2017)	32.9° (1978)
10	65.3°	46.2°	7%	84.4° (2017)	36.1° (1998)
11	64.8°	47.3°	15%	75.7° (2017)	35.6° (1972)
12	63.9°	45.7°	12%	80.4° (2010)	32.4° (1972)
13	63.5°	45.7°	13%	76.5° (2017)	33.8° (1985)
14	63.9°	44.6°	12%	74.7° (2017)	32.4° (1972)
15	64.4°	45°	10%	78.4° (2023)	34.5° (1975)
16	64.9°	45°	20%	79.2° (1998)	35.6° (1971)
17	64.2°	45.5°	20%	77° (1998)	35.4° (1971)
18	63.7°	45.7°	22%	77.5° (2024)	34.9° (1968)
19	63.1°	45.3°	22%	75.6° (2004)	35.8° (2006)
20	63.1°	44.8°	17%	78.6° (1960)	34.7° (1992)
21	62.4°	45.1°	18%	75.4° (1960)	32° (1968)
22	62.8°	45.5°	18%	77.4° (1960)	31.8° (1990)
23	63.7°	45.1°	15%	77.4° (1989)	29.5° (1990)
24	63.9°	44.2°	20%	77.5° (1989)	29.8° (1998)
25	64°	44.8°	17%	78.8° (2013)	31.3° (1974)
26	62.6°	44.4°	17%	77.2° (2022)	32.2° (1987)
27	62.1°	44.2°	15%	77.5° (2013)	32.7° (1988)
28	61.9°	44.8°	22%	78.6° (1963)	33.6° (1962)
29	62.2°	44.8°	23%	79.9° (1963)	34.3° (1988)
30	62.2°	44.6°	18%	81° (1980)	32.5° (1982)
31	62.2°	45°	18%	76.5° (1963)	33.1° (1990)