Taking the local weather in Cao Bang into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually July and June, with an average temperature of 25°C, while the coldest months are January and December, with an average of 15°C. The rainiest months in Cao Bang are June, August, July and May, with each month seeing an average of 309 mm of rainfall.