As of 00:28 PDT

Rossmoor, CA weather in September

71°

Rossmoor, Sunday, 9 August, 00:28

Clear. Feels like 72°. High 97°, low 70°.

Pressure29.88 inHg

Wind5 mph NW

Humidity89%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

In September, Rossmoor, CA averages a high of 81.1° and a low of 63.2°. About 0.3 inches of precipitation fall over the month (1 wet days). The record high is 107.8° (2022) and the record low 51.4° (1978). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.9°	64.6°	2%	98.6° (1998)	57.4° (1973)
2	83.5°	64.9°	2%	97.3° (1982)	59.2° (2010)
3	83.8°	64.8°	7%	99.9° (1988)	58.5° (1961)
4	84.6°	64.9°	2%	107.8° (2022)	57.7° (1970)
5	84.2°	65.1°	3%	101.7° (2024)	58.1° (1999)
6	84°	64.8°	2%	100.6° (2024)	57.4° (1973)
7	83.3°	64.4°	0%	96.4° (2024)	57.6° (1980)
8	83.1°	64.4°	0%	101.7° (2024)	58.3° (1961)
9	82.2°	64.4°	3%	99° (2022)	57.7° (1962)
10	81°	64°	5%	96.6° (1983)	57.6° (1962)
11	80.4°	63.1°	5%	98.2° (1983)	56.7° (1999)
12	80.2°	63°	2%	101.3° (1971)	56.8° (1962)
13	79.3°	63°	2%	102.2° (1971)	57.6° (1962)
14	79.9°	62.8°	2%	95.9° (2014)	55.8° (1973)
15	79.9°	62.6°	5%	98.2° (1979)	56.7° (2005)
16	79.9°	63°	3%	97.2° (2014)	56.7° (2021)
17	79.5°	62.6°	2%	94.5° (1984)	56.5° (2021)
18	79.2°	62.4°	5%	97.2° (1984)	56.5° (1993)
19	78.8°	62.1°	3%	97.5° (1984)	51.4° (1978)
20	78.3°	62.1°	8%	94.3° (2015)	54° (1978)
21	79.5°	62.1°	0%	90.9° (1972)	54.1° (1965)
22	81°	62.1°	3%	92.3° (1992)	53.8° (1964)
23	81.1°	62.1°	3%	99.1° (1975)	55° (1986)
24	81.3°	62.4°	7%	100.4° (1978)	56.5° (2017)
25	80.8°	62.6°	7%	98.6° (1963)	56.7° (1970)
26	79.9°	62.6°	5%	104.2° (1963)	55.4° (1970)
27	79.9°	62.1°	0%	100.4° (1963)	53.1° (2013)
28	79.9°	62.1°	3%	101.1° (1963)	53.2° (2013)
29	79.9°	62.2°	7%	97° (1963)	54° (1965)
30	80.4°	62.1°	3%	102° (2020)	54.9° (1965)