Claude Monet was born on 14 November 1840 on the 5th floor of 45 rue Laffitte, in the 9th arrondissement of Paris. He was the second son of Claude Adolphe Monet and Louise Justine Aubrée Monet, both of them second-generation Parisians. On 20 May 1841, he was baptized in the local parish church, Notre-Dame-de-Lorette, as Oscar-Claude, but his parents called him simply Oscar. In 1845, his family moved to Le Havre in Normandy. His father wanted him to go into the family grocery business, but Monet wanted to become an artist. His mother was a singer.
On the first of April 1851, Monet entered Le Havre secondary school of the arts. Locals knew him well for his charcoal caricatures, which he would sell for ten to twenty francs. Monet also undertook his first drawing lessons from Jacques-François Ochard, a former student of Jacques-Louis David. On the beaches of Normandy in about 1856/1857, he met fellow artist Eugène Boudin, who became his mentor and taught him to use oil paints. Boudin taught Monet "en plein air" (outdoor) techniques for painting. Both received the influence of Johan Barthold Jongkind.
On 28 January 1857, his mother died. At the age of sixteen, he left school and went to live with his widowed childless aunt, Marie-Jeanne Lecadre.
After several difficult months following the death of Camille, a grief-stricken Monet (resolving never to be mired in poverty again) began in earnest to create some of his best paintings of the 19th century. During the early 1880s, Monet painted several groups of landscapes and seascapes in what he considered to be campaigns to document the French countryside. His extensive campaigns evolved into his series' paintings.
Camille Monet had become ill with tuberculosis in 1876. Pregnant with her second child she gave birth to Michel Monet in March 1878. In 1878 the Monets temporarily moved into the home of Ernest Hoschedé, (1837–1891), a wealthy department store owner and patron of the arts. Both families then shared a house in Vétheuil during the summer. After her husband (Ernest Hoschedé) became bankrupt, and left in 1878 for Belgium, and after the death of Camille Monet in September 1879, and while Monet continued to live in the house in Vétheuil; Alice Hoschedé helped Monet to raise his two sons, Jean and Michel, by taking them to Paris to live alongside her own six children. They were Blanche Hoschedé Monet, (she eventually married Jean Monet), Germaine, Suzanne Hoschedé, Marthe, Jean-Pierre, and Jacques. In the spring of 1880, Alice Hoschedé and all the children left Paris and rejoined Monet still living in the house in Vétheuil. In 1881, all of them moved to Poissy, which Monet hated. In April 1883, looking out the window of the little train between Vernon and Gasny, he discovered Giverny. They then moved to Vernon, then to a house in Giverny in Normandy, where he planted a large garden and where he painted for much of the rest of his life. Following the death of her estranged husband, Alice Hoschedé married Claude Monet in 1892.