Rialto is a city in San Bernardino County, California, United States. The population was 99,171 as of the 2010 Census.
Rialto is home to major regional distribution centers: Staples Inc., which serves stores across the entire West Coast of the United States, Amazon (company), Under Armour, Medline Industries, Niagara Bottling, Monster Energy and Target in the northern region of the city, in the Las Colinas community. One of the United States' largest fireworks companies, Pyro Spectaculars, is also headquartered in Rialto.
Rialto, also known as "Bridge City," features a somewhat cooler version of a Mediterranean climate, which is known for wet, cool to chilly winters with hot, dry summers.
The particularly arid climate during the summer prevents tropospheric clouds from forming, meaning temperatures rise to what is considered Class Orange by NOAA. Rialto gets an average of 16 inches (410 mm) of rain, and maybe hail most of this rainfall precipitates in winter. During winter, Rialto's northernmost neighborhood gets snow, heavily at times as a result of its elevation of about 3,000 feet (910 m) above sea level. However, most of the city is out of snowfall's path.
The seasonal Santa Ana winds are felt particularly strongly in not only Rialto but the greater San Bernardino area as warm and dry air is channeled through nearby Cajon Pass at times during the autumn months. This phenomenon markedly increases the wildfire danger in the foothill, canyon, and mountain communities that the cycle of cold, wet winters and dry summers helps create.
Rialto is located at 34°6′41″N 117°22′57″W (34.111360, −117.382403).
According to the United States Census Bureau, the city has a total area of 22.4 square miles (58 km2).