Asunción has a humid subtropical climate (Köppen: ''Cfa'') that closely borders on a tropical savanna climate (Köppen ''Aw''), characterized by hot, humid summers (average of  in January), and mild winters (average of  in July).  Relative humidity is high throughout the year, so the heat index is higher than the true air temperature in the summer, and in the winter it can feel cooler. The average annual temperature is . The average annual precipitation is high, with  distributed in over 80 days yearly. The highest recorded temperature was  on 1 October 2020, while the lowest recorded temperature was  on 27 June 2011.