March weather forecast in Fort Smith

March in Fort Smith is the rainiest month of the year. In March, the weather in Fort Smith is typically warm. Average daily high temperature in March is about 15 degrees above zero. On average, Fort Smith has 13 sunny, 10 rainy, and 8 partly cloudy days in March. The rains are usually heavy. March as well as January, February, and December is considered the most uncomfortable time to visit Fort Smith.