Average annual temperature is 17.5 °C
Absolute maximum temperature: 40.9 °C
Absolute minimum temperature: 1.1 °C
Number of sunny days: 238 days
Number of rainy days: 127 days
Look at detailed online map of Viana do Alentejo
* Weather data for Viana do Alentejo Portugal is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 18.9 | 20.2 | 27.1 | 34.6 | 32.4 | 39.4 | 38.0 | 40.9 | 34.5 | 33.4 | 22.2 | 19.6 |
| Average daytime temperature (°C) | 14.0 | 16.1 | 19.7 | 25.7 | 25.9 | 31.1 | 32.7 | 34.6 | 27.1 | 24.9 | 18.7 | 15.2 |
| Average temperature (°C) | 9.5 | 10.3 | 13.6 | 18.2 | 19.3 | 23.7 | 24.3 | 26.0 | 20.8 | 19.5 | 14.1 | 10.5 |
| Average night temperature (°C) | 6.0 | 5.9 | 8.8 | 11.7 | 13.5 | 17.4 | 16.9 | 18.6 | 16.1 | 15.2 | 10.6 | 6.9 |
| Absolute minimum temperature (°C) | 1.1 | 1.6 | 1.1 | 7.5 | 11.6 | 14.3 | 14.2 | 14.7 | 12.0 | 9.8 | 4.6 | 2.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 8.7 | 8.5 | 11.2 | 11.9 | 12.2 | 13.1 | 12.5 | 9.8 | 7.2 | 7.0 | 6.4 |
| Precipitation (mm) | 47 | 20 | 28 | 11 | 17 | 28 | 0 | 0 | 64 | 150 | 57 | 30 |
| Sunny days | 17 | 17 | 16 | 26 | 22 | 16 | 29 | 31 | 16 | 13 | 18 | 17 |
| Rainy days | 14 | 11 | 15 | 4 | 9 | 14 | 2 | 0 | 14 | 18 | 12 | 14 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Viana do Alentejo during the most sunny months:
The largest precipitation sum in Viana do Alentejo is at