Paraguay weather varies greatly between the country’s two main regions; in the Paranena area weathern is predominantly subtropical, veering towards more tropical patterns in the Chaco region.
Paraguay weather in the Paraneña region is characteristically humid with very little fluctuation in seasonal temperatures. Precipitation remains high throughout the year. The warm sirocco winds that blows out of the northeast dominates conditions during summer, and a cold wind known locally as the pampero takes over the reigns in winter. Thanks to Paraguay’s lack of dominating topographical barriers, the usually moderate disposition of Paraguay weather suffers greatly from the abrupt and irregular changes brought forward by these opposite prevailing winds.
Weather in the Paraneña region can be divided into two distinct seasons: summer runs between October and March, and winter from May to August, while April and September act as transitional periods. During the latter, temperatures are usually bellow midsummer’s average, occasionally dropping bellow zero. Winters are rather mild with July being the coldest month of the year, with a mean temperature of about 18°C. Although during some winters Paraguay weather becomes even milder than usual, with winds blowing constantly from the north, and little frost, occasionally the Antarctic air brings subfreezing temperatures to the region.
Between October and March, weather in the Paraneña region remains warm thanks to the impact of moist tropical air. Temperatures vary from area to area usually hovering between 21°C to 29°C. During summer temperature peaks at 38°C, although frequent waves of cool air from the south cause conditions to vary between clear, humid conditions and storms.
The region experiences a fairly evenly distributed rainfall, which peaks between March and May as well as from October to November. Annual average precipitation stands at 127 centimeters, although subregions may experience considerable variations from year to year.
Weather in Paraguay follows distinctively different patterns in the Chaco region, veering towards more tropical wet-and-dry patterns that often border on semi-arid. Although seasonal variations are rather insignificant, the region alternates between seasons that either flood or scorch the land.
Temperatures in the Chaco region remain high throughout the year, dropping slightly during winter. Despite the constant breeze, even night time temperatures remain stifling. Rainfall in the region is rather scarce and usually falls during summer. Usually varying from 50 to 100 centimeters per year, the higher areas are blessed with somewhat greater levels of precipitation.
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