Average annual temperature is 24.9 °C
Absolute maximum temperature: 45.8 °C
Absolute minimum temperature: 3.2 °C
Number of sunny days: 314 days
Number of rainy days: 51 days
Look at detailed online map of Santa Mercedes
* Weather data for Santa Mercedes Mexico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 27.1 | 28.6 | 32.0 | 37.8 | 37.7 | 45.6 | 43.8 | 45.8 | 43.1 | 41.9 | 36.5 | 31.0 |
| Average daytime temperature (°C) | 22.2 | 22.7 | 27.0 | 32.2 | 34.0 | 38.6 | 41.3 | 40.9 | 39.8 | 35.7 | 29.7 | 26.5 |
| Average temperature (°C) | 14.6 | 15.0 | 19.1 | 23.3 | 25.9 | 30.6 | 34.6 | 33.9 | 32.3 | 28.0 | 22.4 | 18.0 |
| Average night temperature (°C) | 8.5 | 9.6 | 12.3 | 14.8 | 18.1 | 22.8 | 28.5 | 27.7 | 25.2 | 21.2 | 15.5 | 10.5 |
| Absolute minimum temperature (°C) | 3.2 | 5.8 | 7.0 | 9.3 | 13.3 | 17.4 | 25.4 | 24.2 | 22.0 | 15.4 | 9.9 | 6.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.2 | 12.0 | 12.9 | 13.6 | 14.0 | 13.8 | 13.2 | 12.3 | 11.5 | 10.7 | 10.3 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.0 | 8.9 | 10.3 | 12.0 | 12.3 | 12.2 | 12.4 | 11.4 | 11.4 | 10.4 | 9.2 | 9.2 |
| Precipitation (mm) | 5 | 49 | 2 | 0 | 0 | 0 | 5 | 14 | 10 | 3 | 1 | 1 |
| Sunny days | 26 | 17 | 29 | 30 | 31 | 29 | 22 | 20 | 25 | 28 | 28 | 29 |
| Rainy days | 5 | 11 | 2 | 0 | 0 | 1 | 9 | 11 | 5 | 3 | 2 | 2 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Santa Mercedes is at