The Gambia has a subtropical climate with distinct dry and rainy seasons. From November to mid-May there is uninterrupted dry weather, with temperatures as low as 16 °C (60.8 °F) in Banjul and surrounding areas.
The Constitution mandates free and compulsory primary education in the Gambia, but a lack of resources and education infrastructure has made implementation difficult. In 1995, the gross primary enrollment rate was 77.1 percent and the net primary enrollment rate was 64.7 percent.
The Gambia River, the country's major waterway, rises in Guinea and follows a twisting path for about 1,600 km (1,000 mi) to the sea.