Danny Dunn and the Weather Machine is the fourth novel in the Danny Dunn series of juvenile science fiction/adventure books written by Raymond Abrashkin and Jay Williams.

The book was first published in 1959 and originally illustrated by Ezra Jack Keats.

Danny accidentally discovers that an ionic transmitter Professor Bulfinch has been working on can be used to create miniature rainclouds.

Floyd C. Gale of Galaxy Science Fiction rated the book four stars out of five for children: "The authors reap plenty of humor ... meanwhile sowing a considerable amount of meteorological knowledge in the process".

This article about a children's science fiction novel of the 1950s is a stub.