Taking the local weather in San Joaquín 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 September and October, with an average temperature of 13°C, while the coldest months are August and July, with an average of 13°C. The rainiest months in San Joaquín are November, April, March and December, with each month seeing an average of 282 mm of rainfall.