If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Cachoeira Paulista: The hottest months are usually February and January with an average temp of 71°F, while the coldest months are July and June with an average of 63°F. The rainiest months in Cachoeira Paulista are January, December, November, and February, with each month seeing an average of 8 inches of rainfall.