As the entire island lies south of the Tropic of Cancer, the local climate is tropical, tempered by the northeast trade winds that blow all year round. The temperature is also determined by the Caribbean Current, which brings warm water from the equator. Cuba’s climate is therefore warmer than Hong Kong’s, which lies at about the same latitude as Cuba but has a subtropical rather than a tropical climate. Generally (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 in January and 27°C in July. The warm temperatures of the Caribbean Sea and Cuba’s location at the entrance to the Gulf of Mexico make the country prone to frequent hurricanes. These occur most frequently in September and October.