Though weather is just one factor, it can really affect your travel plans, especially if you are planning a longer stay in Tiassale. The hottest months are usually January and February with an average temp of 82°F, while the coldest months are July and August with an average of 76°F. The rainiest months in Tiassale are June, October, September, and May, with each month seeing an average of 8 inches of rainfall.