As of 22:52 PDT

Rialto, CA weather in May

81°

Rialto, Saturday, 8 August, 22:52

Clear. Feels like 80°. High 95°, low 67°.

Pressure29.91 inHg

Wind2 mph W

Humidity37%

Visibility6.2 mi

Dew point52°

See detailed hourly forecast

In May, Rialto, CA averages a high of 76.4° and a low of 52.5°. About 0.6 inches of precipitation fall over the month (3 wet days). The record high is 103.1° (1984) and the record low 36.3° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	74.5°	50.5°	7%	91° (2014)	36.3° (1967)
2	75.6°	50.2°	5%	95.9° (2004)	41.2° (1967)
3	75.9°	51.1°	7%	97° (2004)	41.2° (2002)
4	74.5°	51.3°	15%	93.9° (2017)	42.1° (1991)
5	72.7°	51.3°	22%	95.2° (1990)	39.7° (1964)
6	72.5°	50.4°	22%	95.7° (2020)	39.4° (1975)
7	73.6°	50.7°	17%	98.1° (2020)	37.6° (1964)
8	74.7°	51.3°	12%	95.5° (2001)	41.2° (1965)
9	74.5°	51.4°	12%	99° (2025)	41.7° (1964)
10	74.7°	51.6°	8%	101.8° (2025)	39.7° (2003)
11	76.1°	51.3°	2%	97.3° (1988)	43.3° (1980)
12	77.5°	51.3°	5%	96.6° (2013)	41.9° (1963)
13	78.1°	52.3°	7%	97.9° (2013)	41.4° (1998)
14	77.5°	53.1°	3%	97.5° (2022)	43.5° (1967)
15	76.3°	52.7°	8%	99.9° (2014)	41.5° (1968)
16	77.2°	52.9°	15%	96.6° (2014)	43.2° (1962)
17	77.5°	53.1°	5%	100.4° (2008)	41.9° (1962)
18	77.4°	53.1°	7%	99.5° (2008)	41° (1977)
19	77.7°	52.9°	8%	95.7° (2008)	41.2° (1974)
20	76.8°	53.4°	10%	94.5° (1988)	41.4° (1974)
21	76.6°	52.9°	8%	98.8° (2000)	43.9° (1962)
22	76.3°	53.1°	7%	94.6° (2000)	43.2° (2002)
23	75.7°	53.6°	8%	97.7° (2001)	45.3° (1995)
24	76.6°	53.2°	3%	93.6° (2021)	41° (1980)
25	75.7°	53.6°	7%	97° (1974)	44.6° (1980)
26	76.5°	53.4°	3%	97.7° (1974)	44.4° (1980)
27	77.5°	53.2°	7%	97.3° (1968)	43.9° (1971)
28	79°	53.8°	5%	101.8° (1973)	44.2° (1971)
29	79°	54.5°	3%	103.1° (1984)	44.4° (1980)
30	80.1°	54.9°	3%	97.3° (2025)	45.1° (2011)
31	80.1°	54.9°	2%	96.4° (2025)	46.4° (1971)