paragraph_text: Oklahoma i/ˌoʊkləˈhoʊmə/ (Cherokee: Asgaya gigageyi / ᎠᏍᎦᏯ ᎩᎦᎨᏱ; or translated ᎣᎦᎳᎰᎹ (òɡàlàhoma), Pawnee: Uukuhuúwa, Cayuga: Gahnawiyoˀgeh) is a state located in the South Central United States. Oklahoma is the 20th most extensive and the 28th most populous of the 50 United States. The state's name is derived from the Choctaw words okla and humma, meaning "red people". It is also known informally by its nickname, The Sooner State, in reference to the non-Native settlers who staked their claims on the choicest pieces of land before the official opening date, and the Indian Appropriations Act of 1889, which opened the door for white settlement in America's Indian Territory. The name was settled upon statehood, Oklahoma Territory and Indian Territory were merged and Indian was dropped from the name. On November 16, 1907, Oklahoma became the 46th state to enter the union. Its residents are known as Oklahomans, or informally "Okies", and its capital and largest city is Oklahoma City.

paragraph_text: With regards to Mexican drug cartels, Oklahoma City has traditionally been the territory of the notorious Juárez Cartel, but the Sinaloa Cartel has been reported as trying to establish a foothold in Oklahoma City. There are many rival gangs in Oklahoma City, one whose headquarters has been established in the city, the Southside Locos, traditionally known as Sureños.

paragraph_text: KRMP (1140 AM) is an urban adult contemporary radio station in Oklahoma City, Oklahoma. The station is owned by The Perry Broadcasting Company. The station's studios are located at Perry Plaza II in the Eastside district of Northeast Oklahoma City, and the transmitter site is in the Southeast side of the city.

paragraph_text: The third-largest university in the state, the University of Central Oklahoma, is located just north of the city in the suburb of Edmond. Oklahoma Christian University, one of the state's private liberal arts institutions, is located just south of the Edmond border, inside the Oklahoma City limits.

paragraph_text: In descending order of population, Oklahoma's largest cities in 2010 were: Oklahoma City (579,999, +14.6%), Tulsa (391,906, −0.3%), Norman (110,925, +15.9%), Broken Arrow (98,850, +32.0%), Lawton (96,867, +4.4%), Edmond (81,405, +19.2%), Moore (55,081, +33.9%), Midwest City (54,371, +0.5%), Enid (49,379, +5.0%), and Stillwater (45,688, +17.0%). Of the state's ten largest cities, three are outside the metropolitan areas of Oklahoma City and Tulsa, and only Lawton has a metropolitan statistical area of its own as designated by the United States Census Bureau, though the metropolitan statistical area of Fort Smith, Arkansas extends into the state.

paragraph_text: Walking trails line Lake Hefner and Lake Overholser in the northwest part of the city and downtown at the canal and the Oklahoma River. The majority of the east shore area is taken up by parks and trails, including a new leashless dog park and the postwar-era Stars and Stripes Park. Lake Stanley Draper is the city's largest and most remote lake.

paragraph_text: Other professional sports clubs in Oklahoma City include the Oklahoma City Dodgers, the Triple-A affiliate of the Los Angeles Dodgers, the Oklahoma City Energy FC of the United Soccer League, and the Crusaders of Oklahoma Rugby Football Club USA Rugby.

paragraph_text: WKY (930 AM) is a radio station located in Oklahoma City and is under ownership of Cumulus Media. Its studios are in Northwest Oklahoma City, and the transmitter and 1 tower are located on E. Britton Road in Oklahoma City.

paragraph_text: Broken Arrow is a city located in the northeastern part of the U.S. state of Oklahoma, primarily in Tulsa County but also with a section of the city in western Wagoner County. It is the largest suburb of Tulsa. According to the 2010 census, Broken Arrow has a population of 98,850 residents and is the fourth-largest city in the state. However, a July 2017, estimate reports that the population of the city is just under 112,000, making it the 280th-largest city in the United States. The city is part of the Tulsa Metropolitan Area, which has a population of 961,561 residents.

paragraph_text: KXXY-FM (96.1 FM, "96.1 KXY") is a country music formatted radio station serving the Oklahoma City area and is owned by iHeartMedia, Inc.. KXY was the flagship station of the Oklahoma City Barons hockey team before they left Oklahoma City. Its transmitter is located in Northeast Oklahoma City, and studios are located at the 50 Penn Place building on the Northwest side.

paragraph_text: The Seattle SuperSonics, a professional basketball team in the NBA, relocated from Seattle, Washington to Oklahoma City, Oklahoma in 2008. The third NBA franchise to relocate in the 2000s, the team began play as the Oklahoma City Thunder in the 2008 -- 09 basketball season.

paragraph_text: Patience Sewell Latting (August 27, 1918 – December 29, 2012) was an American politician who served as Mayor of Oklahoma City, Oklahoma, from 1971 to 1983. Latting was the first female Mayor of Oklahoma City.

paragraph_text: The state has two primary newspapers. The Oklahoman, based in Oklahoma City, is the largest newspaper in the state and 54th-largest in the nation by circulation, with a weekday readership of 138,493 and a Sunday readership of 202,690. The Tulsa World, the second most widely circulated newspaper in Oklahoma and 79th in the nation, holds a Sunday circulation of 132,969 and a weekday readership of 93,558. Oklahoma's first newspaper was established in 1844, called the Cherokee Advocate, and was written in both Cherokee and English. In 2006, there were more than 220 newspapers located in the state, including 177 with weekly publications and 48 with daily publications.

paragraph_text: With 19.48 inches of rainfall, May 2015 was by far Oklahoma City's record-wettest month since record keeping began in 1890. Across Oklahoma and Texas generally, there was record flooding in the latter part of the month

paragraph_text: The Oklahoma City Oil Field is one of the world's giant petroleum fields and is located in Oklahoma City, Oklahoma in the United States of America. The field was opened just south of the city limits on December 4, 1928, and first entered Oklahoma City limits on May 27, 1930.

paragraph_text: Solomon Andrew Layton (July 22, 1864 – February 6, 1943) was an American architect who designed over 100 public buildings in the Oklahoma City, Oklahoma area and was part of the Layton & Forsyth firm. Layton headed partnerships in Oklahoma from 1902 to 1943; his works included the Canadian County Jail in El Reno, Oklahoma State Capitol, sixteen Oklahoma courthouses, and several buildings on the University of Oklahoma campus. Layton had a considerable influence on Oklahoma City architecture, and he became known as the "dean of Oklahoma City architecture"

paragraph_text: According to Forbes magazine, Oklahoma City-based Devon Energy Corporation, Chesapeake Energy Corporation, and SandRidge Energy Corporation are the largest private oil-related companies in the nation, and all of Oklahoma's Fortune 500 companies are energy-related. Tulsa's ONEOK and Williams Companies are the state's largest and second-largest companies respectively, also ranking as the nation's second and third-largest companies in the field of energy, according to Fortune magazine. The magazine also placed Devon Energy as the second-largest company in the mining and crude oil-producing industry in the nation, while Chesapeake Energy ranks seventh respectively in that sector and Oklahoma Gas & Electric ranks as the 25th-largest gas and electric utility company.

paragraph_text: The Egyptian art collection at the Mabee-Gerrer Museum of Art in Shawnee is considered to be the finest Egyptian collection between Chicago and Los Angeles. The Oklahoma City Museum of Art contains the most comprehensive collection of glass sculptures by artist Dale Chihuly in the world, and Oklahoma City's National Cowboy and Western Heritage Museum documents the heritage of the American Western frontier. With remnants of the Holocaust and artifacts relevant to Judaism, the Sherwin Miller Museum of Jewish Art of Tulsa preserves the largest collection of Jewish art in the Southwest United States.

paragraph_text: Slaughterville is a town in Cleveland County, Oklahoma, United States, and located in the Oklahoma City metropolitan area. As of the 2010 census, the city population was 4,137.

paragraph_text: Bethany is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. The community was founded in 1909 by followers of the Church of the Nazarene from Oklahoma City.

Question: When was the most rainfall for Oklahoma's largest city?
Answer: May 2015