Weather of Guantanamo, Cuba The climate of Cuba is tropical, but other climatic times coexist located in the mountain systems and on the coasts as the case of Guantánamo. It is defined in two periods: little rainy and rainy. Read More... Not very rainy (November to April): Known as winter, the variations of weather and climate become more noticeable, with abrupt changes in daily time, associated with the passage of frontal systems. It is more noticeable in the western half than in the eastern half. Rainy (May to October): Known as summer, there are few variations in time, with the most important changes being the passage of eastern waves and tropical cyclones. The hurricane season throughout Cuba is from June 1 to November 30. The climate of Guantanamo has interesting characteristics that differentiate it from the rest of the island, since in its northern slope of the Sagua - Baracoa mountain range, the highest values of annual precipitation in the country are recorded above 3 600 mm, and in the slope south of the massif the lowest rates of rainfall at the nation level that do not exceed 600 mm per year. The average annual temperature of Guantánamo fluctuates between 25 ºC and 26.8 ºC in the flat zone, and between 20 ºC and 24 ºC in the mountainous part, and the relative humidity ranges from 70 to 86%.