Last updated: March 2, 2024
The weather in Arenal, Colombia, during September is characterized by an average temperature of 27°C (82°F). Highs can soar to 35°C (95°F), while lows may dip to 23°C (73°F). Typically, the humidity level in Arenal throughout September hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Arenal averages 193 mm (7.6 inches) of rainfall, typically over the course of 25 rainy days. The month enjoys an average of 12 hours 8 minutes of daylight, with the sun shining for approximately 8 hours 57 minutes each day. Additionally, there is a 15% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Arenal reaches a maximum of 13, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, 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 | 13 | 12 | 9 | 5 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 30 min | 45 min | |||||