Last updated: March 2, 2024
The weather in Casillas, Guatemala, during September is characterized by an average temperature of 20°C (68°F). Highs can soar to 28°C (83°F), while lows may dip to 14°C (58°F). Typically, the humidity level in Casillas throughout September hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Casillas averages 314 mm (12.4 inches) of rainfall, typically over the course of 28 rainy days. The month enjoys an average of 12 hours 10 minutes of daylight, with the sun shining for approximately 9 hours 34 minutes each day. Additionally, there is a 17% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Casillas reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 3 | 7 | 10 | 13 | 14 | 12 | 9 | 6 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||