Avondale is a city in Maricopa County, Arizona, United States, adjacent to Phoenix.

Once primarily a sparsely populated farming community with many acres of alfalfa and cotton fields, Avondale has transformed into a major bedroom suburb for Phoenix.

William "Billy" G. Moore, arrived in Arizona in the late 1860s, settling near the Agua Fria River in 1880.

Moore called bought land and named his settlement "Coldwater, Arizona" - apparently for both the river and the water that flowed from a local spring.

Recently, the city has seen tremendous growth in new development, both residential and commercial, while the Old Town area along Western Avenue preserves the historic business district and safeguards opportunities for small, independent businesses.

Over the last decade, population growth took place at a rate of over 114%, making the city one of the fastest-growing in Maricopa County.

[6] It is bordered to the west by Goodyear, to the north by Litchfield Park, and to the east by Phoenix and Tolleson.

Avondale has a large amount of sunshine year-round due to its stable descending air and high pressure.

[7] Winters are sunny and mild with nighttime lows averaging between 40 °F (4 °C) and 50 °F (4 °C and 10 °C) and daytime highs ranging from 60 °F (16 °C) to 75 °F (16 °C to 24 °C).

Summers are extremely hot, with daily high temperatures at or above 100 °F (38 °C) for the entirety of June, July, and August, as well as many days in May and September.

Lows in the winter occasionally dip below freezing, which may damage some desert plants such as saguaros and other cacti.

In the summer (mainly July, August, and early September), the North American Monsoon can hit the Phoenix area in the afternoon and evening (possibly continuing overnight), causing rain showers even from a sunny morning.

The surveying marker of the Gila and Salt River Meridian is located on Monument Hill.

The federal government recognized this point for measuring the boundary between the United States and Mexico after the Mexican–American War ended.

Since 2020, Phoenix Raceway has served as host of the annual NASCAR championship race, each November.

[19] City parks: Avondale falls within Arizona's 7th Congressional District, served by Representative Raúl Grijalva and Arizona's 19th State Legislative District, served by Representatives Lorenzo Sierra and Diego Espinoza and SenatorLupe Contreras, all Democrats.