Taking into account the local weather in Silvia is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and August with an average temp of 61°F, while the coldest months are August and July with an average of 61°F. The rainiest months in Silvia are July, May, June, and April, with each month seeing an average of 32 inches of rainfall.