Taking into account the local weather in Jacobs River is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually February and January with an average temp of 45°F, while the coldest months are July and August with an average of 27°F. The rainiest months in Jacobs River are May, September, December, and July, with each month seeing an average of 14 inches of rainfall.