December weather forecast
Colares, Brazil

December, the first month of the summer in Colares, is still a tropical month, with an average temperature varying between 24.9°C (76.8°F) and 30.5°C (86.9°F).

Temperature

Colares's shift into December sets the average high-temperature at a still hot 30.5°C (86.9°F), a figure that deviates only slightly from November's 31.4°C (88.5°F). Colares's average low-temperature during December nights is observed to be a warm 24.9°C (76.8°F).

Heat index

December's average heat index is calculated to be a fiery hot 39°C (102.2°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in December in Colares is 78%.

Rainfall

In Colares, during December, the rain falls for 24.7 days and regularly aggregates up to 172mm (6.77") of precipitation. Throughout the year, there are 315.6 rainfall days, and 2313mm (91.06") of precipitation is accumulated.

Daylight

The month with the longest days in Colares is December, with an average of 12h and 12min of daylight.
On the first day of the month, sunrise is at 05:57 and sunset at 18:07. On the last day of December, sunrise is at 06:11 and sunset at 18:21 -03.

Sunshine

In Colares, the average sunshine in December is 8.3h.

UV index

January, June through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during December leads to these instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.