...and more
In terms of precipitation, rainfall in Douala ranges from 2.0 - 24.4 inches per month. July is typically the wettest month, when rainfall can reach 24.4 in. January is typically the driest time to visit Douala when rainfall is around 2.0 in.
If weather is an important factor for your trip to Douala, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 77.0 F).