You might spend a lot of your holiday 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 October and September, with an average temperature of 26°C, while the coldest months are July and June, with an average of 22°C. The rainiest months in Buena Vista are December, January, February and November, with each month seeing an average of 246 mm of rainfall.