Last updated: March 2, 2024
The weather in Castanhal, Brazil, during December is characterized by an average temperature of 27°C (81°F). Highs can soar to 34°C (94°F), while lows may dip to 22°C (73°F). Typically, the humidity level in Castanhal throughout December hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Castanhal averages 202 mm (8.0 inches) of rainfall, typically over the course of 23 rainy days. The month enjoys an average of 12 hours 11 minutes of daylight, with the sun shining for approximately 10 hours 0 minutes each day. Additionally, there is a 16% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In December, the UV Index in Castanhal reaches a maximum of 13, 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 | 6 | 9 | 12 | 13 | 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 | ||||