Taking into account the local weather in Ribeirao do Pinhal can help you maximize your time at the pool during your trip. The hottest months are usually December and September with an average temp of 73°F, while the coldest months are July and June with an average of 65°F. The rainiest months in Ribeirao do Pinhal are January, December, February, and November, with each month seeing an average of 8 inches of rainfall.