As of 20:56 PDT

Fullerton, CA weather in May

79°

Fullerton, Saturday, 8 August, 20:56

Clear. Feels like 79°. High 98°, low 70°.

Pressure29.85 inHg

Wind3 mph W

Humidity61%

Visibility6.2 mi

Dew point65°

See detailed hourly forecast

In May, Fullerton, CA averages a high of 75.4° and a low of 55.3°. About 0.4 inches of precipitation fall over the month (2 wet days). The record high is 105.8° (1984) and the record low 41° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	74.3°	53.2°	3%	93.9° (2014)	41° (1967)
2	75.6°	53.6°	3%	97.9° (2004)	45.5° (1967)
3	75.6°	54.3°	3%	99.7° (2004)	46.4° (1967)
4	74.5°	54.5°	13%	92.7° (1987)	48° (1964)
5	73°	54.3°	10%	99.9° (1990)	46.8° (1964)
6	73°	54°	13%	98.2° (1990)	45.7° (1975)
7	73.9°	54°	12%	93° (2020)	43.9° (1964)
8	74.1°	54.1°	5%	96.1° (1984)	44.8° (2017)
9	74.3°	54.5°	10%	96.8° (2025)	45.3° (1979)
10	74.3°	54.7°	5%	102.6° (2025)	45.5° (2003)
11	75.2°	54.3°	3%	93.6° (1988)	47.5° (2022)
12	76.5°	54.3°	3%	94.5° (2013)	45.9° (1967)
13	77°	55.4°	5%	97.3° (2013)	46.6° (1998)
14	76.5°	55.4°	2%	99.7° (2014)	47.8° (1995)
15	75.6°	55.6°	8%	101.7° (2014)	46.9° (1998)
16	75.7°	55.6°	8%	98.2° (1967)	47.7° (2011)
17	76.5°	55.8°	5%	95° (2008)	48.9° (1962)
18	76.1°	55.6°	3%	93.4° (2008)	46.4° (1977)
19	76.1°	55.4°	3%	91° (2008)	47.8° (1974)
20	75.4°	55.9°	8%	94.8° (2017)	47.1° (1972)
21	75.6°	55.9°	3%	92.5° (1988)	46.9° (1972)
22	75.2°	55.8°	12%	90° (1988)	48.6° (1972)
23	74.5°	56.1°	8%	88° (2001)	48.6° (1960)
24	74.8°	55.9°	3%	91.9° (2021)	45.9° (1980)
25	74.3°	55.9°	2%	96.4° (1974)	47.5° (1980)
26	75°	56.1°	2%	92.3° (1968)	48.7° (1980)
27	76.1°	55.9°	7%	93.6° (1997)	47.3° (2019)
28	77.2°	56.5°	3%	97.7° (1973)	47.7° (2019)
29	77.4°	57°	2%	105.8° (1984)	49.8° (1980)
30	77.7°	57°	2%	96.4° (2025)	48.9° (2011)
31	77.2°	57.2°	2%	88.3° (2025)	50.4° (2011)