Weather is only one factor, but it can really affect your travel plans, especially when you are planning a longer stay in Cassville. The hottest months are usually July and August, with an average temperature of 21°C, while the coldest months are January and February, with an average of 0°C. The snowiest months in Cassville are January, February, December and March, with each month seeing an average of 17 cm of snowfall.