Climate averages 1991–2020
Asunción weather
in September.
A warm, wet month: the 8th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Asunción: daytime highs average 26.4°C and nights cool to about 16.6°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 107 mm of rain on roughly 9 days, which makes September a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average September day.
The nearest other city in this atlas is San Lorenzo (15 km away). In September its highs average 26.5°C, about as warm as Asunción, with 114 mm of rain.
Among the 7 cities listed in Paraguay, Asunción ranks joint 3rd of 7 for the warmest September highs and 1st of 7 for the driest September (rainfall, lowest first). The mean September high of those 7 cities is 26.2°C; Asunción is 0.3°C warmer than that mean.
From September to October, average highs rise by 2.0°C to 28.4°C, and monthly rainfall rises from 107 mm to 185 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Asunción climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.1°C23.7°C | 23.7°C | 121 | 12.5 | 13.514 h |
| February | 31.3°C23.2°C | 23.2°C | 142 | 12.7 | 13.013 h |
| March | 30.2°C22.0°C | 22.0°C | 119 | 10.7 | 12.312 h |
| April | 27.5°C19.4°C | 19.4°C | 155 | 9.8 | 11.512 h |
| May | 23.3°C15.9°C | 15.9°C | 136 | 8.9 | 10.911 h |
| June | 21.9°C14.6°C | 14.6°C | 101 | 8.7 | 10.611 h |
| July | 21.6°C13.2°C | 13.2°C | 74 | 7.9 | 10.711 h |
| August | 24.3°C14.7°C | 14.7°C | 64 | 6.5 | 11.211 h |
| September, selected | 26.4°C16.6°C | 16.6°C | 107 | 8.7 | 11.912 h |
| October | 28.4°C19.4°C | 19.4°C | 185 | 12.1 | 12.713 h |
| November | 29.4°C20.3°C | 20.3°C | 189 | 11.6 | 13.313 h |
| December | 31.2°C22.5°C | 22.5°C | 160 | 12.8 | 13.714 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- San Lorenzo in SeptemberParaguay · 15 kmHigh 26.5°C · Low 16.5°C · 114 mm rain
- Nemby in SeptemberParaguay · 16 kmHigh 26.4°C · Low 16.5°C · 113 mm rain
- Limpio in SeptemberParaguay · 21 kmHigh 26.9°C · Low 16.9°C · 114 mm rain
- Capiatá in SeptemberParaguay · 22 kmHigh 26.3°C · Low 16.4°C · 114 mm rain
- Formosa, Argentina in SeptemberArgentina · 113 kmHigh 25.8°C · Low 15.9°C · 110 mm rain
- Corrientes in SeptemberArgentina · 270 kmHigh 24.1°C · Low 14.5°C · 115 mm rain
- Ituzaingó in SeptemberArgentina · 273 kmHigh 24.0°C · Low 15.3°C · 139 mm rain
- Resistencia in SeptemberArgentina · 276 kmHigh 24.5°C · Low 14.6°C · 106 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Asunción) is explained once on the Asunción year overview and on the Sources, method and limits page.