December weather forecast
Japi, Brazil

The first month of the summer, December, is also a hot month in Japi, Brazil, with an average temperature fluctuating between 22.6°C (72.7°F) and 31.5°C (88.7°F).

Temperature

Japi registers an average high-temperature of a still tropical 31.5°C (88.7°F) with the arrival of December, showing minor deviation from the preceding month. Nightly temperatures drop to an average low of 22.6°C (72.7°F) in December.

Heat index

In December, the heat index is appraised at a scorching 40°C (104°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Japi, the average relative humidity in December is 72%.

Rainfall

In Japi, during December, the rain falls for 14.1 days and regularly aggregates up to 16mm (0.63") of precipitation. Throughout the year, in Japi, there are 205.7 rainfall days, and 444mm (17.48") of precipitation is accumulated.

Daylight

With an average of 12h 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 17:27. On the last day of the month, sunrise is at 05:12 and sunset at 17:41 -03.

Sunshine

In December, the average sunshine in Japi is 6.4h.

UV index

March through September, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Japi. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 6 suggests this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.