When you're travelling with pets, keeping track of the weather can help you make the trip more safe and fun for everyone. The hottest months are usually January and December, with an average temperature of 26°C, while the coldest months are July and June, with an average of 16°C. The rainiest months in Termas de Rio Hondo are January, February, December and March, with each month seeing an average of 251 mm of rainfall.