Taking the local weather in Riverside into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are February and January, with an average of -3°C. The snowiest months in Riverside are February, January, December and October, with each month seeing an average of 86 cm of snowfall.