Climate of El Salvador

El Salvador has a tropical climate with pronounced wet and dry seasons. Temperatures vary primarily with elevation and show little seasonal change. The Pacific lowlands are uniformly hot; the central plateau and mountain areas are more moderate. The rainy season extends from May to October. Almost all the annual rainfall occurs during this time, and yearly totals, particularly on southern-facing mountain slopes, can be as high as 2,170 millimeters (85.4 in).

Protected areas and the central plateau receive less, although still significant, amounts. Rainfall during this season generally comes from low pressure over the Pacific and usually falls in heavy afternoon thunderstorms. Hurricanes occasionally form in the Pacific with the notable exception of Hurricane Mitch.

From November through April, the northeast trade winds control weather patterns. During these months, air flowing from the Caribbean has lost most of the precipitation while passing over the mountains in Honduras. By the time this air reaches El Salvador, it is dry, hot, and hazy.

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