When you're travelling with pets, keeping tabs on the weather can make the trip safe and fun for everyone. The hottest months are usually September and October, with an average temperature of 21°C, while the coldest months are July and August, with an average of 17°C. The rainiest months in São Gonçalo do Rio das Pedras are December, November, January and March, with each month seeing an average of 276 mm of rainfall.