As of 00:54 PDT

Fontana, CA weather in September

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 September, Fontana, CA averages a high of 88.1° and a low of 63°. About 0.4 inches of precipitation fall over the month (1 wet days). The record high is 113.5° (2020) and the record low 47.3° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	92.3°	65.8°	5%	107.1° (2022)	54.5° (1964)
2	92.5°	66.2°	8%	105.8° (2007)	50.7° (1964)
3	91.9°	66.6°	8%	108.1° (2022)	55.6° (2000)
4	92.5°	66.7°	2%	106.9° (2022)	55.4° (1985)
5	92.3°	67.1°	3%	112.3° (2020)	56.8° (1970)
6	92.5°	66.7°	3%	113.5° (2020)	54.9° (2000)
7	91.9°	66.6°	3%	106.5° (2024)	52.9° (1965)
8	90.9°	66°	2%	103.6° (2024)	48.7° (1965)
9	89.6°	65.3°	5%	105.6° (2024)	52° (1965)
10	88.2°	64.6°	7%	102.4° (1993)	52.5° (1965)
11	88°	63.3°	7%	103.3° (1971)	50.7° (1985)
12	87.6°	62.8°	2%	106.2° (1971)	49.6° (1972)
13	86.9°	62.6°	7%	107.4° (1971)	52° (1972)
14	87.1°	62.1°	3%	103.6° (2014)	51.8° (1994)
15	86.9°	62.2°	8%	103.6° (2014)	51.6° (1970)
16	86.4°	62.2°	7%	103.8° (2000)	52.3° (1986)
17	86.2°	61.9°	2%	100.4° (2000)	52.7° (2005)
18	85.6°	61.3°	3%	100.4° (2016)	49.3° (1993)
19	84.7°	60.4°	2%	97.7° (1984)	50.2° (1978)
20	84.6°	60.6°	10%	100.8° (2015)	47.3° (1965)
21	85.6°	59.9°	5%	99.5° (2003)	49.1° (1968)
22	86.4°	60.6°	3%	99.7° (2002)	50.9° (1988)
23	87.4°	61°	3%	101.8° (2002)	51.1° (1986)
24	87.4°	61.5°	3%	100.9° (1978)	51.1° (1986)
25	86.9°	61.7°	5%	102.4° (2010)	50.4° (2005)
26	86°	61.3°	10%	103.8° (2010)	50° (1986)
27	86.2°	61°	5%	106.5° (2010)	49.1° (2013)
28	86°	61.2°	2%	101.1° (1963)	47.5° (1971)
29	85.5°	61°	10%	101.8° (2020)	47.5° (1986)
30	86°	60.1°	3%	103.3° (2020)	47.7° (1982)