Managua, like much of Western Nicaragua, except for the Sierras to the South, has a tropical climate with constant temperatures averaging between . Under Köppen's climate classification, the city has a tropical wet and dry climate. A distinct dry season exists between November and April, while most of the rainfall is received between May and October. Temperatures are highest in March, April and May when the sun lies directly overhead and the summer rainfall has yet to begin. The country spends most of the year with strong heat waves and a bright shining sun. The temperature varies from 72° F at night and 86° during the day time. There is no fall or winter, as other countries in the world, on the contrary, as stated before it only has two seasons, the dry and the rainy. The rainy season starts in mid-may to mid-November. The dry-season begins from mid-November to mid to the end of May. During these times the country gets dull and even dusty. 