Despite being adjacent to the equator, the city has a tropical monsoon climate due to the fact that its driest month (January) sees on average below 60 mm of rain. Kisangani experiences an average relative humidity of 86%.
Typical climate in regions through which the Congo River flows is that of Kisangani, a town situated on the river’s right and left bank slightly north of the Equator. Humidity is high throughout the year, and annual rainfall amounts to 64 inches (1,620 mm) and occurs fairly regularly; even in the driest month the rainfall totals more than 2 inches (53 mm). Temperatures are also uniformly high throughout the year, and there is little diurnal variability. The average temperature at Kisangani is in the mid-20s°C (mid-70s°F). Kisangani is also a beneficiary of a cool breeze that often blows off the Congo River.