Taking the local weather in Sao Nicolau into account can help you maximise your time at the pool during your trip. The hottest months are usually January and February, with an average temperature of 25°C, while the coldest months are July and June, with an average of 15°C. The rainiest months in Sao Nicolau are October, November, January and December, with each month seeing an average of 217 mm of rainfall.