You might spend a lot of your vacation inside, but if you’re planning to venture beyond the casino, looking at local weather trends is a good idea. The hottest months are usually January and February with an average temp of 77°F, while the coldest months are July and June with an average of 57°F. The rainiest months in Artigas are October, November, September, and January, with each month seeing an average of 7 inches of rainfall.