As of 03:25 PDT

San Mateo, CA weather in December

59°

San Mateo, Sunday, 9 August, 03:25

Partly cloudy. Feels like 59°. High 87°, low 59°.

Pressure29.83 inHg

Wind1 mph S

Humidity91%

Visibility6.2 mi

Dew point57°

See detailed hourly forecast

In December, San Mateo, CA averages a high of 56.4° and a low of 45°. About 3.6 inches of precipitation fall over the month (9 wet days). The record high is 70° (1979) and the record low 25.2° (1990). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	58.6°	47.3°	27%	66.7° (2021)	39.7° (2007)
2	58.3°	46.6°	25%	68.2° (1986)	38.7° (2022)
3	58.6°	47.1°	27%	70° (1979)	39.9° (2005)
4	58.1°	47.1°	27%	67.5° (1979)	37.2° (1971)
5	57.9°	47.3°	25%	65.5° (1962)	36.3° (1972)
6	57.9°	46.6°	30%	66.9° (1962)	36.1° (1978)
7	58.1°	46.2°	30%	68.5° (1975)	33.1° (1978)
8	57.4°	46°	20%	67.8° (1990)	30.9° (1972)
9	57.6°	46°	32%	68° (1990)	26.2° (1972)
10	57°	46°	25%	65.1° (1962)	28.6° (1972)
11	56.1°	45°	28%	65.1° (1988)	30.6° (1972)
12	56.1°	45.9°	28%	65.3° (1988)	36.3° (2013)
13	55.9°	45.3°	27%	63° (1962)	30° (1972)
14	55.9°	45°	28%	65.3° (1962)	32.7° (1967)
15	55.9°	44.1°	27%	65.7° (1976)	31.6° (1967)
16	57°	44.1°	18%	66.6° (1976)	36° (1971)
17	56.7°	44.2°	37%	67.1° (1979)	34.3° (2008)
18	55.6°	44.2°	28%	63.3° (1972)	35.8° (1971)
19	55.9°	44.1°	28%	67.6° (1999)	37.2° (1984)
20	55°	44.4°	32%	65.7° (1999)	33.3° (1968)
21	55.2°	44.2°	40%	65.7° (1999)	27.3° (1990)
22	55°	44.2°	35%	65.3° (1999)	25.2° (1990)
23	55.8°	43.5°	23%	63.7° (1999)	28.4° (1990)
24	55.8°	43.9°	27%	66.4° (2013)	28.8° (1990)
25	55.8°	43.3°	27%	65.5° (1980)	35.1° (1987)
26	55.2°	43.2°	33%	67.8° (1980)	34.3° (1990)
27	55.4°	44.6°	30%	65.5° (1967)	35.8° (2007)
28	55°	43.7°	30%	66.2° (1975)	35.1° (1990)
29	55.4°	44.4°	33%	64.8° (2013)	35.2° (1974)
30	54.9°	44.2°	28%	64.4° (1963)	36° (1978)
31	54.9°	44.1°	23%	63.5° (1980)	33.4° (1990)