As of 19:35 PDT

Fullerton, CA weather in August

85°

Fullerton, Saturday, 8 August, 19:35

Clear. Feels like 85°. High 98°, low 70°.

Pressure29.83 inHg

Wind4 mph SW

Humidity47%

Visibility6.2 mi

Dew point62°

See detailed hourly forecast

In August, Fullerton, CA averages a high of 87.8° and a low of 65°. About 0.1 inches of precipitation fall over the month (0 wet days). The record high is 106.7° (2017) and the record low 55.4° (1968). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	88°	65.1°	2%	97.5° (1972)	57.2° (2013)
2	88°	65.1°	2%	99.3° (1997)	59.4° (2013)
3	87.6°	64.9°	3%	97.3° (2024)	59° (1962)
4	88°	64.6°	0%	99.9° (1998)	59.2° (1962)
5	88.7°	64.9°	0%	103.8° (1997)	58.3° (1991)
6	88.5°	65.1°	2%	101.5° (1983)	58.5° (2010)
7	88°	65.1°	0%	100.8° (2018)	57° (2010)
8	88.2°	64.8°	0%	99.1° (1965)	57.4° (2010)
9	88°	65.1°	3%	103.1° (2018)	55.9° (2010)
10	87.4°	65.1°	2%	97.5° (1994)	57.9° (2010)
11	87.8°	65.1°	0%	99° (2000)	57.4° (2010)
12	87.6°	64.9°	0%	99.7° (1994)	56.5° (2010)
13	88°	65.1°	0%	102.7° (1983)	58.6° (1974)
14	86.9°	64.9°	0%	99.5° (2020)	58.3° (2010)
15	86.9°	64.9°	2%	100.2° (2020)	59° (2010)
16	87.1°	64.9°	3%	99.9° (1992)	59.2° (1987)
17	86.9°	65.1°	3%	101.5° (1992)	59° (2009)
18	86.2°	64.9°	5%	106.5° (2020)	58.5° (1975)
19	85.6°	64.6°	5%	99.3° (1992)	59° (1975)
20	86.5°	64.4°	2%	99.9° (2024)	59.2° (2009)
21	86.5°	64.4°	2%	101.8° (1969)	58.5° (1975)
22	87.1°	64.4°	0%	101.3° (1969)	55.4° (1968)
23	87.8°	64.2°	0%	100° (1998)	57.6° (1968)
24	87.8°	64.8°	0%	101.1° (1985)	59.5° (1987)
25	88.2°	64.9°	2%	104.7° (1985)	57.7° (1978)
26	88.9°	65.1°	2%	104.4° (1981)	59° (1990)
27	89.6°	65.3°	0%	104° (1981)	58.1° (1973)
28	90°	65.5°	0%	103.5° (1981)	58.5° (1975)
29	90.3°	65.7°	2%	102.9° (1967)	58.5° (2010)
30	88.9°	65.8°	0%	104.2° (1967)	58.1° (1964)
31	88.3°	65.1°	2%	106.7° (2017)	58.8° (1973)