Average annual temperature is 25.3 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: 10.1 °C
Number of sunny days: 88 days
Number of rainy days: 277 days
Look at detailed online map of Unión
* Weather data for Unión Peru is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 32.1 | 31.7 | 32.0 | 31.5 | 31.8 | 31.3 | 32.9 | 35.4 | 36.6 | 37.5 | 37.0 | 33.3 |
| Average daytime temperature (°C) | 29.1 | 28.8 | 29.4 | 29.1 | 28.3 | 28.4 | 31.1 | 32.5 | 33.9 | 34.3 | 32.1 | 30.9 |
| Average temperature (°C) | 24.4 | 24.3 | 24.5 | 24.5 | 24.1 | 22.7 | 24.8 | 26.1 | 27.3 | 27.9 | 26.6 | 25.8 |
| Average night temperature (°C) | 21.3 | 21.4 | 21.6 | 21.2 | 21.1 | 18.4 | 19.6 | 20.9 | 22.5 | 23.2 | 22.8 | 22.7 |
| Absolute minimum temperature (°C) | 17.8 | 19.3 | 20.3 | 19.0 | 18.1 | 10.1 | 15.9 | 17.6 | 20.2 | 21.6 | 18.9 | 21.3 |
| 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 | 12.5 | 12.2 | 11.8 | 11.6 | 11.5 | 11.5 | 11.7 | 12.0 | 12.4 | 12.6 | 12.8 |
| 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) | 8.5 | 7.5 | 7.9 | 8.4 | 8.1 | 9.7 | 10.5 | 10.4 | 10.5 | 10.3 | 9.3 | 8.9 |
| Precipitation (mm) | 238 | 273 | 252 | 146 | 151 | 29 | 3 | 37 | 71 | 88 | 170 | 262 |
| Sunny days | 3 | 2 | 0 | 4 | 3 | 10 | 21 | 21 | 8 | 9 | 6 | 1 |
| Rainy days | 28 | 26 | 31 | 26 | 28 | 20 | 10 | 10 | 22 | 22 | 24 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Unión is at