As of 00:58 PDT

Montclair, CA weather in September

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 September, Montclair, CA averages a high of 87.5° and a low of 63.5°. About 0.4 inches of precipitation fall over the month (1 wet days). The record high is 115.2° (2020) and the record low 48.6° (1982). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	91°	65.7°	3%	108° (2017)	55.6° (1964)
2	91.4°	66.4°	8%	105.3° (1982)	53.2° (1964)
3	91°	66.7°	7%	107.1° (1988)	55.6° (2000)
4	91.8°	66.9°	3%	108.9° (2022)	57° (1985)
5	91.6°	67.1°	3%	115.2° (2020)	56.3° (1970)
6	91.6°	66.7°	3%	112.8° (2024)	56.7° (1964)
7	91°	66.2°	3%	107.8° (2024)	54.1° (1965)
8	90.1°	65.8°	3%	107.6° (2024)	51.4° (1965)
9	88.9°	65.7°	7%	108.1° (2024)	53.8° (1961)
10	87.4°	64.9°	7%	101.3° (1983)	54.1° (2010)
11	87.3°	63.9°	5%	104° (1983)	52.9° (1985)
12	86.9°	63.3°	2%	106.5° (1971)	51.8° (1972)
13	86°	63.1°	7%	108.9° (1971)	53.1° (1966)
14	86.5°	62.4°	2%	103.3° (2014)	53.2° (1970)
15	86.4°	62.6°	5%	102.9° (2014)	52° (1986)
16	85.6°	62.8°	7%	102.9° (2014)	52.7° (1986)
17	85.5°	62.1°	2%	101.5° (2020)	53.2° (1982)
18	85.1°	61.9°	3%	100.8° (2020)	51.4° (1993)
19	84.4°	61.3°	2%	99.3° (1984)	52.3° (1978)
20	84°	61°	5%	99.5° (2015)	50° (1965)
21	85.1°	61°	3%	101.8° (2021)	50.2° (1986)
22	86.4°	61.7°	5%	99.7° (2009)	50.9° (1986)
23	87.3°	61.9°	3%	100.6° (1982)	52.3° (1986)
24	87.1°	62.2°	7%	100.9° (1978)	52.3° (1986)
25	86.5°	62.2°	5%	101.5° (1963)	52.5° (1986)
26	85.5°	62.2°	5%	102.7° (2010)	52.3° (1986)
27	85.6°	61.9°	2%	106.2° (2010)	50.9° (1986)
28	85.6°	61.9°	3%	102.6° (1963)	50.9° (1971)
29	85.1°	61.9°	8%	102.4° (2020)	49.5° (1971)
30	85.8°	61.2°	3%	105.8° (2020)	48.6° (1982)