Average annual temperature is 9.6 °C
Absolute maximum temperature: 20.3 °C
Absolute minimum temperature: -1.2 °C
Number of sunny days: 90 days
Number of rainy days: 275 days
Look at detailed online map of Once de Mayo
* Weather data for Once de Mayo Guatemala is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 16.4 | 18.4 | 18.7 | 20.3 | 20.1 | 18.4 | 16.2 | 16.8 | 16.2 | 15.9 | 17.6 | 16.1 |
| Average daytime temperature (°C) | 13.7 | 15.2 | 15.5 | 17.4 | 16.3 | 16.1 | 14.6 | 15.0 | 14.9 | 14.0 | 13.9 | 13.8 |
| Average temperature (°C) | 7.7 | 8.4 | 9.5 | 10.9 | 11.0 | 10.9 | 9.7 | 10.0 | 9.8 | 9.6 | 9.0 | 8.1 |
| Average night temperature (°C) | 2.8 | 3.0 | 4.7 | 5.4 | 6.8 | 6.6 | 5.7 | 6.0 | 5.4 | 5.9 | 5.0 | 3.3 |
| Absolute minimum temperature (°C) | -1.2 | -0.4 | 1.1 | 2.2 | 4.5 | 4.0 | 3.5 | 3.1 | 3.9 | 4.0 | 2.5 | 0.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.1 | 12.5 | 12.8 | 13.0 | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.1 | 10.5 | 10.6 | 11.1 | 10.6 | 10.1 | 9.6 | 9.0 | 9.7 | 8.6 | 9.0 | 10.1 |
| Precipitation (mm) | 18 | 7 | 67 | 35 | 133 | 114 | 199 | 144 | 125 | 212 | 88 | 12 |
| Sunny days | 18 | 16 | 11 | 11 | 8 | 4 | 3 | 1 | 0 | 0 | 5 | 13 |
| Rainy days | 13 | 12 | 20 | 19 | 23 | 26 | 28 | 30 | 30 | 31 | 25 | 18 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Once de Mayo is at