In general (with local variations), there is a drier season from November to April, and a rainier season from May to October. The average temperature is 21 °C (69.8 °F) in January and 27 °C (80.6 °F) in July. The warm temperatures of the Caribbean Sea and the fact that Cuba sits across the entrance to the Gulf of Mexico combine to make the country prone to frequent hurricanes. These are most common in September and October.