Average annual temperature is 21.6 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: 5.6 °C
Number of sunny days: 140 days
Number of rainy days: 225 days
Look at detailed online map of Once de Septiembre
* Weather data for Once de Septiembre Argentina is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 34.4 | 32.8 | 32.5 | 29.4 | 27.8 | 26.0 | 26.9 | 30.6 | 35.5 | 34.2 | 35.4 | 35.4 |
| Average daytime temperature (°C) | 30.2 | 28.1 | 29.3 | 25.3 | 24.0 | 21.9 | 23.1 | 25.0 | 28.3 | 27.6 | 28.8 | 30.4 |
| Average temperature (°C) | 24.7 | 23.1 | 24.0 | 20.5 | 18.9 | 16.9 | 18.0 | 19.3 | 22.4 | 22.6 | 23.9 | 25.3 |
| Average night temperature (°C) | 20.5 | 19.3 | 20.3 | 16.8 | 15.1 | 13.3 | 14.4 | 15.0 | 18.0 | 18.8 | 20.1 | 21.4 |
| Absolute minimum temperature (°C) | 17.0 | 11.3 | 17.3 | 10.7 | 8.8 | 7.9 | 5.6 | 9.3 | 7.4 | 14.0 | 10.5 | 16.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.5 | 13.0 | 12.2 | 11.5 | 10.9 | 10.6 | 10.7 | 11.2 | 11.9 | 12.7 | 13.4 | 13.7 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 11.0 | 9.6 | 9.9 | 8.8 | 8.0 | 7.2 | 8.0 | 9.2 | 8.5 | 8.3 | 9.0 | 10.0 |
| Precipitation (mm) | 118 | 254 | 127 | 149 | 140 | 148 | 172 | 75 | 201 | 359 | 308 | 176 |
| Sunny days | 6 | 5 | 8 | 10 | 18 | 18 | 19 | 21 | 13 | 8 | 7 | 7 |
| Rainy days | 25 | 23 | 23 | 20 | 13 | 12 | 12 | 10 | 17 | 23 | 23 | 24 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Once de Septiembre is at