The Republic of Congo has a tropical climate with high temperatures and high humidity year-round and a lot of rainfall. The equator crosses the country just north of Liranga. There is little seasonal variation in temperature, but the climate does vary according to terrain and region. The average temperature is a humid 75°F (24°C) during the day, and slightly cooler at night. It seldom gets cold. The terrain is a variety of mountainous regions and flat coastal plains, with about 70 percent of the country covered by rainforest. It is rainy almost all year round, with a brief dry season between June and September in the south, and between December and February in the north. During the wet months the country's rivers are routinely flooded and travel by road becomes difficult.
The best time to visit the Republic of the Congo is in the cooler dry season, which is between June and August, however it is wise to note that the north remains fairly wet throughout the year. Travellers should be sure to take plenty of insect repellant and sunscreen, and should pack light, breathable clothing as well as waterproofs.