When you're dreaming of a trip to Tsaratanana, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually October and November, with an average temperature of 28°C, while the coldest months are July and August, with an average of 25°C. The rainiest months in Tsaratanana are January, February, December and March, with each month seeing an average of 396 mm of rainfall.