As of 10:06 PDT

Fullerton, CA weather in October

81°

Fullerton, Sunday, 9 August, 10:06

Clear. Feels like 84°. High 95°, low 71°.

Pressure29.88 inHg

Wind2 mph SW

Humidity68%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

In October, Fullerton, CA averages a high of 79.1° and a low of 57.4°. About 0.6 inches of precipitation fall over the month (2 wet days). The record high is 103.6° (1987) and the record low 35.6° (1971). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.8°	61.2°	5%	101.7° (2020)	50.2° (1971)
2	82°	60.6°	12%	100.4° (1991)	50.2° (1971)
3	81.1°	60.4°	7%	102.7° (1987)	51.6° (2002)
4	81°	59.9°	8%	103.6° (1987)	51.4° (1986)
5	81.3°	59.5°	10%	97.3° (1971)	50.5° (1969)
6	81.9°	59.2°	3%	98.4° (1971)	51.6° (1969)
7	82°	59.4°	5%	98.2° (1996)	49.3° (2007)
8	81.5°	58.6°	5%	94.5° (2008)	50° (1970)
9	81°	58.6°	8%	98.8° (1988)	48.2° (1961)
10	80.4°	58.5°	7%	103.5° (1991)	46.9° (2013)
11	79.3°	58.3°	7%	97.9° (2015)	48.9° (1960)
12	79.9°	57.7°	2%	97° (2020)	46.6° (2008)
13	79.5°	57.6°	7%	97° (2020)	48° (2008)
14	79.3°	57.9°	8%	100.6° (1961)	47.7° (1981)
15	79.2°	57.9°	8%	99.9° (1961)	47.8° (1966)
16	79.3°	57.4°	7%	97° (2017)	46.4° (1981)
17	79.2°	57.2°	8%	95.9° (1967)	46.4° (1971)
18	79.2°	57°	8%	93.6° (1967)	47.5° (1971)
19	79.3°	56.7°	8%	96.1° (2022)	44.8° (1971)
20	78.1°	57.2°	8%	94.8° (2016)	47.3° (1971)
21	77.4°	56.5°	8%	95.7° (2003)	47.8° (1971)
22	78.1°	56.7°	7%	97.2° (1965)	44.8° (1996)
23	78.6°	56.3°	10%	103.3° (2017)	46.2° (1996)
24	78.4°	56.7°	3%	103.5° (2017)	46.6° (1975)
25	77.5°	56.7°	5%	98.8° (2017)	44.2° (1971)
26	77.2°	55.2°	5%	92.3° (1965)	45.3° (1989)
27	76.5°	55°	10%	92.8° (1965)	44.4° (1996)
28	75.9°	54.3°	12%	93° (1965)	43.2° (1970)
29	75.4°	53.8°	2%	92.3° (2025)	36.1° (1971)
30	74.8°	53.8°	15%	92.5° (1962)	35.6° (1971)
31	75.2°	53.4°	5%	90.9° (1962)	39.9° (1971)