A Summer Afternoon, Bushveld  by  Jacob Hendrik Pierneef

1928 / Oil on canvas / 26.8”x43.3” / Private collection

Summer Moonlight, Firth of Clyde  by Patrick Downie

1928 / Oil on panel / 24 1/2”x30 3/4” / Bristol City Museum and Art Gallery

Summer Fantasy  by  George Bellows

1924 / Oil on canvas / 36”x48” / Henry E. Huntington Library and Art Gallery, San Marino, CA

Summer, 1904 by Joaquín Sorolla Bastida

1904 / Oil on canvas / 58.6”x99.2” / Museo Nacional de Bellas Artes de La Habana, Cuba

Summer Sunshine  by  Martha Walter

ND / Oil on canvas / 26”x21” / Private collection

Summer evening on the beach at Skagen. The painter and his wife  by  P.S. Krøyer

1899 / Oil on canvas / 53”x73 5/8” / The Hirschsprung Collection, Copenhagen

P. S. Krøyer’s paintings of Marie
https://en.wikipedia.org/wiki/P._S._Kr%C3%B8yer%27s_paintings_of_Marie

Summertime  by  Mary Cassatt

1894 / Oil on canvas / 39 5/8”x32”
Terra Foundation for American Art

“In several paintings dating to the early 1890s the artist placed her typical figures in boats. Summertime is directly related to an identically titled canvas (about 1894; Armand Hammer Museum of Art, Los Angeles), which features the same woman and girl seen from a greater distance, with more of the rowboat and a bit of the shore visible. Because the surface of that painting reflects a less spontaneous application of paint, scholars have suggested that the Terra painting was executed first.”  https://bit.ly/3k8kshs

1894 / Oil on canvas / 29”x37.9” / Hammer Museum

Summer at Shinnecock Hills  by  William Merritt Chase

1891 / Oil on canvas / 26 1/2”x32 1/2” / Cincinnati Art Museum