Weather in Asuncion in September 2025
- September is usually the driest month of the year in Asuncion
Average weather
Average temperature in Asuncion in September
Going from a maximum of +39°C during the day to a minimum of +10°C during the night, the temperature in September averages around +30°C.
The average maximum temperature goes down 14% by the end of the month, compared with the beginning of the month, from +31°C to +27°C.
Is Asuncion warm or cold in September?
Asuncion is typically warm in September.
Maximum temperatures go up compared to the previous month from +25°C to +27°C. The minimum temperature also goes up from +15°C to +16°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Asuncion:
Climate in Asuncion in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +27°C | +29°C | ||||
| Min. temperature | ||||||
| +1°C | +3°C | +7°C | ||||
| Max. temperature | ||||||
| +38°C | +41°C | +43°C | ||||
| Rainfall | ||||||
| 77 mm | 116 mm | 182 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 71% | 70% | 72% | ||||
| Air pressure | ||||||
| 1015 HPa | 1013 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 14 | 12 | 10 | ||||
| Cloudy days | ||||||
| 8 | 6 | 5 | ||||
| Rainy days | ||||||
| 8 | 10 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +25°C to +27°C during the day. Prepare for more rain. Average rainfall goes from 77 mm to 116 mm. It feels drier, as humidity decreases from 71% to 70%. The average wind speed doesn’t change much during September, staying around 3 m/s. The days becoming less sunny, going from 14 sunny days in August to 12 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Asuncion is gradually decreasing during September, going from 5 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Asuncion?
Climate Change over Years
The climate in Asuncion in September has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+26°C) and the highest in 2020 (+30°C). The driest year was 2020 with only 815 mm of rainfall, and the wettest year was 1998 with 2510 mm.
FAQ
Is September a good time to visit Asuncion?
Can you sunbathe in Asuncion in September?
Is Asuncion rainy in September?
Is it sunny in Asuncion in September?
Monthly weather in Asuncion
Source of the data
For this page, we’ve looked at the typical weather in Asuncion, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.