 Due to the low elevation and the ubiquitous presence of water, the Paraná delta is subject to a particular climate within the climate zones of the Pampas.As in the entire region, there are four distinct seasons; however, the Delta has slightly colder nights, milder winters and higher humidity, which allows some warmer-weather species to thrive

Summers are hot and often muggy; with daily highs between and nights between .Heat waves are common, yet they are not as intense as in central Argentina, and usually temperatures will not go much above 36 °C (97F), although they have reached 40 °C (104F) in the past.