Number of days available for climatic review
| Parámetro | ene | feb | mar | abr | may | jun |
| Tmáx | 511 | 460 | 530 | 505 | 525 | 515 |
| Tmín | 506 | 453 | 527 | 500 | 525 | 510 |
| Duración del tiempo soleado | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitación | 528 | 485 | 544 | 518 | 541 | 539 |
| Humedad/Visibilidad | 41 | 34 | 66 | 52 | 59 | 63 |
| Parámetro | jul | ago | sep | oct | nov | dic |
| Tmáx | 528 | 530 | 507 | 510 | 496 | 519 |
| Tmín | 522 | 525 | 499 | 503 | 489 | 508 |
| Duración del tiempo soleado | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitación | 556 | 565 | 540 | 579 | 575 | 578 |
| Humedad/Visibilidad | 64 | 58 | 47 | 40 | 42 | 47 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |
Ciudad de Guatemala