Frequent rain to limit summer heat from northern Argentina through central Brazil As northeastern Brazil faces a worsening drought, much of the country is forecast to receive plenty of rain and thunderstorms throughout the season.
The widespread rain will also help to limit extreme heat from building across the region.
A few heat waves are still possible, but they are expected to be brief before the rains return.
Rounds of rain will also help to reduce drought concerns across Colombia and Venezuela, countries that have faced extreme drought in recent years.
This includes Quito, the capital of Ecuador, and Lima, the capital of Peru.
Summer heat to scorch Chile, Argentina Some of the hottest weather across South America this summer will focus on Chile and Argentina as hot and dry conditions prevail across the region.
Heat waves will be common across the region, including in Santiago, Chile, and Córdoba, Argentina.
“The summer is usually the driest part of the year for much of Chile and central and southern Argentina, so we are not expecting much rain, if any, in these areas,” Nicholls said.
Last summer, high demands for electricity during heat waves led to power cuts in Argentina.
“Far southern parts of Chile and Argentina can have some rain on occasion, especially later in the summer,” Nicholls said.

2017 South America spring forecast: Drought to persist in eastern Brazil; Frequent storms to pose flood risk to Chile, Argentina.
Dry weather will be the theme for much of eastern and northern South America this spring, which will raise drought concerns as the season progresses.
Meanwhile, frequent storms will bring the threat for flooding farther south in parts of Chile and Argentina.
Drought to worsen across eastern Brazil The threat for drought will loom for Brazil in the coming months as dry conditions dominate the weather pattern.
While drought concerns grow across much of Brazil, other parts of the country will see more frequent rain.
“Areas farther south in Brazil, and into Paraguay, Uruguay and northern Argentina have had adequate rains during the winter and we expect near- to slightly above-normal rainfall in these area for the spring as a whole,” Nicholls said.
There is some concern that the rain may become less frequent by November in this area; however, it is unlikely that drought will begin to set in.
Dry pattern to raise drought concerns from Colombia to French Guiana Winter rains have helped to ease drought conditions across northern areas of South America; however, dry conditions are poised to return in the coming months.
Rounds of rain to bring flood threat to Chile, Argentina While many areas of South America cope with drier-than-normal conditions during the spring months, wet weather will be more common in southern regions of the continent.
“Frequent storms are likely across southern Chile into southern Argentina during September into October with the risk of flooding in these areas,” Nicholls said.

2017 South America winter forecast: Drought to worry Colombia, Venezuela; Frequent storms to strike Chile, Argentina.
Meanwhile, warm waters in the Pacific Ocean will help to spread rain across much of the western countries of South America.
Argentina to face more rain, mountain snow than last winter Rounds of rain will frequent Argentina this winter as storm systems move across the country on a regular basis.
“More storms are expected across central Argentina this year versus last year with near- to slightly above-normal rainfall in cities such as Buenos Aires,” AccuWeather Lead International Meteorologist Jason Nicholls said.
Drought concerns to return to Colombia, Venezuela Drought has plagued Colombia and Venezuela in recent years, and this winter will bring little relief to the countries.
“Drought concerns will return along the Caribbean coast of the continent from northern Colombia and Venezuela to French Guiana,” Nicholls said.
Warm waters off the coast of Brazil may keep drought conditions from returning to far northeastern Brazil, Nicholls said.
While winter is not typically a wet time of year, drought conditions could develop in the Brazilian states of São Paulo to Minas Gerias, Nicholls said.
Wet winter on tap from Chile to Peru Frequent storms will bring rounds of rain and mountain snow to Chile this winter with the tracks of the storms shifting as the season progresses.
“The warm waters over the Pacific Ocean will lead to wetter-than-normal conditions from Ecuador and Peru into Bolivia,” Nicholls said.

Rain and thunderstorms will frequent much of South America this autumn as wet weather occurs from Argentina to parts of Colombia and Venezuela.
Drought to improve in Colombia, Venezuela but worsen in northeastern Brazil The drought gripping Colombia and Venezuela will improve with a wet pattern continuing into autumn.
This includes helping to raise the water level at the Guri Dam, one of the largest water reservoirs on Earth.
While rain helps to improve the drought in Colombia and Venezuela, dry weather will cause drought conditions to worsen in Brazil.
Some rain is expected to move over these areas throughout the season; however, below-normal rainfall will cause the drought to persist and possibly worsen.
Rounds of rain, thunderstorms to slam Argentina to southern Brazil An active weather pattern is on tap for much of Argentina, Paraguay, Uruguay, Bolivia and southern Brazil this season as waves of rain and thunderstorms move across the region.
“It seems like there will be an active weather pattern with no prolonged dry periods and near- to above-normal rainfall,” Miller said.
The threat for thunderstorms will be mainly early in the season before gradually tapering off as the fronts deliver steadier rain instead, AccuWeather Lead International Meteorologist Jason Nicholls said.
Most of Chile should see near-normal rainfall, but a few pockets could receive above-normal rainfall, Miller added.
Warm, dry weather is also on tap for southern Argentina and southern Peru.