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; this time of year is referred to as invierno or winter. Almost all the annual rainfall occurs during this period; yearly totals, particularly on southern-facing mountain slopes, can be as high as 2,170 millimetres (85.4 in).
The best time to visit El Salvador would be at the beginning or end of the dry season. Protected areas and the central plateau receive less, although still significant, amounts. Rainfall during this season generally comes from low pressure systems formed over the Pacific and usually falls in heavy afternoon thunderstorms. Hurricanes occasionally form in the Pacific with the notable exception of Hurricane Mitch, which formed in the Atlantic and crossed Central America.
From November through April, the northeast trade winds control weather patterns; this time of year is referred to as verano, or summer. During these months, air flowing from the Caribbean has lost most of its precipitation while passing over the mountains in Honduras. By the time this air reaches El Salvador, it is dry, hot, and hazy, and the country experiences hot weather, excluding the northern higher mountain ranges, where temperatures will be cool. In the extreme northeastern part of the country near Cerro El Pital, snow is known to fall during summer as well as during winter due to the high elevations (it is the coldest part of the country)
