If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Colville: The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are December and January, with an average of -3°C. The snowiest months in Colville are January, December, February and March, with each month seeing an average of 16 cm of snowfall.