Weather in Asunción

Rain is the monsoon runs from October to May, inside an annual total of 1474 mm. The wettest month is November at 190 mm; the driest is August at 38 mm.

Asunción is in Paraguay at 25.3°S. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. January is the warmest month (average 28.5°C, high 34.0°C) and July is the coolest (average 16.8°C, low 11.1°C). On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are April, August, and September.

When Asunción gets wet

The monsoon in Asunción starts in October and ends in May (October, November, December, January, February, March, April, and May). November is the core of it at 190 mm. August is the other extreme, with 38 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. November averages 12 such days; August averages 6.

Hot and cool months in Asunción

The heat peaks in January, when the typical afternoon is 34.0°C. The opposite pole is July, when mornings average 11.1°C.

Mean high across all twelve months is 29.0°C and mean low is 17.4°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Distinctive months in Asunción

January is the warmest month. Afternoon highs average 34.0°C and nights settle near 23.0°C, with 126 mm of rain. April: 29.4°C high, 18.3°C low, 149 mm rain, 75% humidity. May closes the monsoon: 143 mm over 10 rainy days, then the calendar dries. June brings 74 mm and 8 rainy days; temperatures run from 12.3°C to 22.6°C.

The year bottoms out in July. Plan for 11.1°C at night and 22.4°C in the afternoon. August is the driest month, averaging only 38 mm across 6 rainy days. Highs sit near 25.3°C. October is when the monsoon typically starts in Asunción: highs near 31.0°C, and rainfall jumps to 163 mm (12 rainy days). November is the wettest month — 190 mm and 12 rainy days, with 71% humidity.

Best months to visit Asunción

The three months with the highest comfort score are April, August, and September: April (23.8°C average, 149 mm, 75% humidity); August (18.9°C average, 38 mm, 73% humidity); September (21.5°C average, 73 mm, 68% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at October–May instead of the score.

How Asunción compares inside Paraguay

Asunción is the only Paraguay city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.