Paraguay is a landlocked country located near the Tropic of Capricorn, and consequently has some extreme weather that tourists should be aware of before traveling. The tropical climate is very hot between December and March (the South American summer), often climbing above 48°C. This is only made worse by the high humidity that prevails throughout the year. However, the temperature tends to drop quite sharply when it rains, and sometimes the air can be quite dry for a few days before a major storm, so be prepared for anything.

The hot summer weather also means that insects, especially mosquitoes, run rampant at night. But most places have air conditioning so it isn't really a big problem. It is not advised to visit the city during high summer, as most Paraguayans themselves leave to get away from the heat during this time of year. If you must go to Asunción between October and March, make sure your hotel room comes with air conditioning or fans, and do not plan activities between noon and 4pm, as the weather outside will be unbearably hot. The middle of winter may be good time to visit this country as well. The temperatures range from 8 degrees Celsius to 22 degrees making it very pleasant though there are days that can get very cold (2 degrees Celsius) so make sure you do take good winter clothes. The weather during Winter is very impredictable so it would be smart to take summer and winter clothes and a good raincoat (though it doesn't rain much in winter).