When you travel with your pet, keeping track of the weather can help you make the trip more safe and fun for everyone. The hottest months are usually February and January, with an average temperature of 24°C, while the coldest months are July and August, with an average of 19°C. The rainiest months in Barra do Pirai are January, December, November and February, with each month seeing an average of 256 mm of rainfall.