As of 00:58 PDT

Montclair, CA weather in December

76°

Montclair, Sunday, 9 August, 00:58

Clear. Feels like 76°. High 100°, low 71°.

Pressure29.88 inHg

Wind4 mph SW

Humidity57%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

In December, Montclair, CA averages a high of 63° and a low of 43.4°. About 2.7 inches of precipitation fall over the month (5 wet days). The record high is 84° (2021) and the record low 27.5° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	66°	45.1°	8%	84° (2021)	33.3° (2004)
2	65.8°	45°	13%	80.2° (2017)	35.1° (2004)
3	66°	45.5°	13%	78.4° (1979)	36.5° (2004)
4	65.5°	45.1°	18%	83.3° (1979)	34.7° (2004)
5	65.7°	45°	18%	81.5° (1979)	32.7° (1972)
6	65.8°	45.5°	15%	82° (1979)	31.5° (1978)
7	64.6°	46°	28%	79.2° (1979)	27.7° (1978)
8	64.6°	44.8°	18%	82.2° (2015)	28.8° (1978)
9	64.6°	44.1°	13%	81.3° (2017)	28.8° (1972)
10	64.6°	43.9°	8%	81.1° (2017)	32.9° (1971)
11	63.5°	44.6°	18%	79.5° (2025)	30.9° (1972)
12	62.8°	43.3°	13%	80.1° (1988)	28° (1972)
13	62.6°	43°	13%	79.2° (2017)	30.9° (1972)
14	62.8°	42.6°	13%	79.3° (2017)	29.7° (1967)
15	62.8°	42.1°	13%	79.5° (2017)	30.9° (1987)
16	63.5°	43.3°	22%	81.1° (2013)	34.2° (1971)
17	63°	43.3°	17%	81.3° (2013)	33.6° (1965)
18	62.2°	43.2°	20%	79.9° (2024)	29.7° (2008)
19	61.9°	42.6°	20%	77.9° (2024)	31.6° (2012)
20	62.1°	42.3°	15%	77.7° (2020)	27.5° (1967)
21	61.7°	42.6°	20%	80.2° (2020)	28° (1968)
22	61.2°	42.8°	22%	73.6° (1989)	29.7° (1998)
23	61.9°	42.4°	17%	78.1° (1989)	27.7° (1990)
24	62.4°	42.6°	15%	79.9° (1989)	30.4° (1990)
25	62.2°	42.8°	20%	79.2° (2022)	29.7° (1990)
26	61.5°	42.1°	18%	80.6° (2022)	28.9° (1987)
27	60.8°	41.5°	15%	79.3° (2013)	29.3° (1987)
28	60.1°	41.9°	23%	81.7° (2017)	30.2° (1987)
29	60.6°	42.3°	23%	83.1° (2017)	30° (1971)
30	60.8°	41.9°	18%	79° (1980)	30.7° (1982)
31	60.8°	41.9°	20%	78.4° (2011)	31.8° (1987)