In August, the weather in Salmon Arm is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Salmon Arm has 13 sunny, 10 partly cloudy, and 8 rainy days in August. The rains are usually moderate. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Salmon Arm.