December weather forecast
Martinópolis, Brazil

The first month of the summer, December, is still a hot month in Martinópolis, Brazil, with an average temperature varying between 21.3°C (70.3°F) and 30°C (86°F).

Temperature

The arrival of December sees a recorded average high-temperature of a still hot 30°C (86°F), showing little divergence from the previous month's conditions. December nights in Martinópolis observe an average temperature dip to an agreeable 21.3°C (70.3°F).

Heat index

The heat index in December is calculated to be a sweltering 37°C (98.6°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
The standards for the heat index are set for locations in shade and under light breezes. 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', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

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

Rainfall

In Martinópolis, during December, the rain falls for 25.8 days and regularly aggregates up to 168mm (6.61") of precipitation. Throughout the year, there are 196.8 rainfall days, and 1260mm (49.61") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 13h and 30min of daylight.
On the first day of December in Martinópolis, Brazil, sunrise is at 05:32 and sunset at 18:55. On the last day of the month, sunrise is at 05:44 and sunset at 19:11 -03.

Sunshine

The average sunshine in December in Martinópolis is 7.8h.

UV index

The months with the highest UV index are January through March, June through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 6 leads to the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.