As of 00:54 PDT

Fontana, CA weather in December

77°

Fontana, Sunday, 9 August, 00:54

Clear. Feels like 77°. High 101°, low 72°.

Pressure29.88 inHg

Wind1 mph S

Humidity45%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

In December, Fontana, CA averages a high of 61.9° and a low of 41.7°. About 2.9 inches of precipitation fall over the month (6 wet days). The record high is 83.5° (2025) and the record low 25° (1970). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	64.9°	43.5°	13%	82.9° (2021)	30.2° (2004)
2	64.8°	42.8°	15%	78.6° (1977)	31.6° (2004)
3	65.1°	43.7°	17%	76.8° (1979)	32.9° (2004)
4	64.6°	43.2°	20%	81.3° (1979)	31.3° (2004)
5	64.8°	43.3°	20%	80.4° (1977)	33.3° (2011)
6	64.6°	44.4°	18%	80.4° (1979)	31.1° (2011)
7	63.3°	44.4°	27%	78.3° (2006)	27.3° (1978)
8	63.5°	42.8°	22%	81.1° (2015)	26.6° (1978)
9	63.7°	42.4°	15%	80.8° (2025)	28° (1972)
10	63.5°	42.6°	10%	83.5° (2025)	31.1° (1985)
11	62.4°	43.2°	20%	83.5° (2025)	29.8° (1972)
12	61.7°	41.9°	13%	79.5° (2017)	25.7° (1972)
13	61.7°	41.4°	17%	80.8° (2017)	28.2° (1985)
14	61.9°	40.8°	17%	75° (1977)	27.5° (1967)
15	61.7°	41°	10%	77° (2017)	28.2° (2001)
16	62.2°	41.5°	23%	79.2° (2013)	30.6° (2015)
17	61.9°	41.7°	23%	80.6° (2013)	30.7° (1965)
18	61°	41.5°	22%	79° (2024)	29.5° (1965)
19	60.8°	41°	22%	79.3° (2024)	29.1° (2012)
20	60.8°	40.8°	22%	78.1° (2020)	25° (1970)
21	60.6°	41°	22%	79.3° (2005)	26.1° (1967)
22	59.9°	41.7°	20%	73.8° (2025)	26.8° (1998)
23	60.8°	40.6°	22%	77° (2005)	25° (1990)
24	61.2°	40.5°	18%	79° (2005)	27.5° (1990)
25	61°	40.5°	23%	78.1° (2022)	26.4° (1990)
26	60.1°	40.1°	22%	80.1° (1980)	28.6° (1990)
27	59.7°	39.7°	17%	78.6° (2013)	29.3° (2015)
28	58.8°	40.3°	25%	81.1° (2017)	28° (1962)
29	59.4°	40.8°	28%	81° (2017)	27° (1971)
30	59.7°	39.7°	22%	77.7° (1980)	26.1° (1982)
31	59.5°	40.3°	20%	78.1° (2011)	29.8° (1987)