Average annual temperature is 25.8 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: 10.8 °C
Number of sunny days: 91 days
Number of rainy days: 274 days
Look at detailed online map of Unión
* Weather data for Unión Bolivia is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 32.3 | 31.5 | 32.5 | 31.6 | 31.6 | 32.0 | 33.5 | 36.5 | 36.7 | 37.9 | 36.6 | 33.6 |
| Average daytime temperature (°C) | 29.8 | 29.0 | 29.1 | 29.3 | 28.9 | 28.8 | 31.7 | 33.6 | 34.5 | 35.2 | 33.0 | 31.1 |
| Average temperature (°C) | 24.8 | 24.5 | 24.7 | 24.7 | 24.7 | 23.4 | 25.3 | 27.1 | 27.8 | 28.7 | 27.3 | 26.1 |
| Average night temperature (°C) | 21.7 | 21.9 | 22.1 | 22.0 | 21.9 | 19.3 | 20.2 | 22.0 | 23.2 | 24.0 | 23.2 | 23.0 |
| Absolute minimum temperature (°C) | 19.2 | 18.4 | 20.5 | 20.1 | 19.4 | 10.8 | 16.0 | 17.6 | 21.4 | 22.0 | 20.1 | 21.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.7 | 12.4 | 12.2 | 11.9 | 11.6 | 11.5 | 11.6 | 11.8 | 12.0 | 12.3 | 12.6 | 12.7 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 9.6 | 7.8 | 7.7 | 9.0 | 8.7 | 9.8 | 10.7 | 10.4 | 10.2 | 10.5 | 10.0 | 9.3 |
| Precipitation (mm) | 181 | 298 | 317 | 232 | 179 | 69 | 4 | 13 | 50 | 84 | 122 | 238 |
| Sunny days | 1 | 1 | 0 | 0 | 1 | 12 | 24 | 25 | 11 | 8 | 7 | 1 |
| Rainy days | 30 | 27 | 31 | 30 | 30 | 18 | 7 | 6 | 19 | 23 | 23 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Unión is at