Three Days of Rain is a play by Richard Greenberg.

The play centers on Walker, his sister Nan, and their childhood friend Pip, who all meet in an unoccupied loft in lower Manhattan in 1995 to divide the legacy of their late fathers, who were partners in a renowned architecture firm. In an effort to bring some peace to their own lives, the three search for clues that might explain what had gone on between their fathers, and the women in their lives, decades before. The story then shifts to that earlier time, with the same three actors portraying members of the previous generation in the same loft, during the fateful 1960 "three days of rain," which gives the play its title. "As today writing after three days of rain" is also a line from W. S. Merwin's poem, "For the Anniversary of My Death" (1967).

The play was commissioned and originally produced by South Coast Repertory in 1997, and had its New York premiere later that year, in a production at the Manhattan Theatre Club featuring Patricia Clarkson, John Slattery and Bradley Whitford. It was nominated for the Pulitzer prize in drama, and has enjoyed many subsequent productions in regional theatres across the United States and abroad. The most famous production to date was on Broadway, where the play was used as a star vehicle for the heavily promoted stage debut of film star Julia Roberts. Opening on April 19 2006 at the Bernard B. Jacobs Theatre, the production included Paul Rudd, and Bradley Cooper. Although it was certainly the most eagerly awaited show of the Broadway season in the popular press, it met with poor response from theatrical reviewers and closed as scheduled in June 2006.

Seattle Public Theater Production, February 2008

The Seattle Public Theater (at Greenlake) produced Three Days of Rain between February 1-24, 2008. The dual role of Walker/Ned was played by Evan Whitfield, also seen at Seattle Public theater in his outstanding performance in Lobby Hero. Peter Dylan played the roles of Theo/Pip; program notes inform readers that he is also the resident carpenter for Seattle's Capitol Hill Arts Center. The third role, Nan/Lina, was played by Sheila Daniels, the recently-named Associate Director of the Intiman Theater in Seattle. The production was directed by Aimée Bruneau.

Nimax Theatres, London, 2009

Three Days Of Rain played at the Apollo Theatre in London from January 30 to May 9, 2009. James McAvoy (Walker/Ned) and Nigel Harman (Pip/Theo) starred in it alongside Lyndsey Marshal. The production was directed by Jamie Lloyd.