"One More Rainy Day" is a song by English hard rock group Deep Purple.The song was the B-side of their first single, "Hush", which was released in 1968. It also appeared on their first album, Shades of Deep Purple. The song was written by Rod Evans and Jon Lord sometime between April and May that year, and it was recorded on 13 May 1968. The song was the last to be recorded for the album, the rest of which had been recorded over the preceding weekend.