April in Carleton Place is the windiest month of the year. In April, the weather in Carleton Place is typically warm. Average daily high temperature in April is about 11 degrees above zero. On average, Carleton Place has 10 rainy, 8 sunny, 6 cloudy, and 6 partly cloudy days in April. The rains are usually heavy. April as well as March, October, November, and December is considered the most uncomfortable time to visit Carleton Place.