December weather forecast
São Gonçalo, Brazil

In December, weather conditions in São Gonçalo signal the full effects of the summer season. While temperature levels remain stable, the amount of rainfall decreases from November's high but still remains relatively high at 103mm (4.06"). The city is flushed with excitement, with sunlight illuminating its stunning natural surroundings. The warmth coupled with the holiday season transforms São Gonçalo into a beautiful blend of natural beauty and festive cheer. This offering of radiant summer weather in São Gonçalo makes it a desirable destination for year-end travels.

Temperature

At the start of December, São Gonçalo's average high-temperature reaches a still moderately hot 28°C (82.4°F), subtly different from the preceding month. December's nights observe an average temperature of 22.5°C (72.5°F).

Heat index

Throughout December, the heat index is estimated at a tropical 32°C (89.6°F). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

The months with the highest humidity are March, November and December, with an average relative humidity of 82%.

Rainfall

In São Gonçalo, in December, it is raining for 21.6 days, with typically 103mm (4.06") of accumulated precipitation. Throughout the year, in São Gonçalo, there are 179.5 rainfall days, and 747mm (29.41") of precipitation is accumulated.

Daylight

With an average of 13h and 30min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 04:58 and sunset at 18:24. On the last day of the month, sunrise is at 05:10 and sunset at 18:40 -03.

Sunshine

In December, the average sunshine in São Gonçalo is 8.4h.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index in São Gonçalo. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.