If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Arduaine: The hottest months are usually July and August, with an average temperature of 13°C, while the coldest months are January and February, with an average of 5°C. The rainiest months in Arduaine are October, December, November and January, with each month seeing an average of 266 mm of rainfall.