December weather forecast
Jaru, Brazil

December, the first month of the summer in Jaru, is also a moderately hot month, with temperature in the range of an average low of 22.3°C (72.1°F) and an average high of 29.5°C (85.1°F).

Temperature

December's arrival shows an average high-temperature of a moderately hot 29.5°C (85.1°F), hardly different from the previous month. An average low-temperature of 22.3°C (72.1°F) marks the nights in Jaru, Brazil throughout December.

Heat index

In December, the average heat index is evaluated at a very hot 38°C (100.4°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Observations indicate that the heat index values are for shady locations with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In December, the average relative humidity is 88%.

Rainfall

In Jaru, in December, during 28.4 rainfall days, 210mm (8.27") of precipitation is typically accumulated. In Jaru, during the entire year, the rain falls for 237.4 days and collects up to 1523mm (59.96") of precipitation.

Daylight

December has the longest days of the year in Jaru, Brazil, with an average of 12h and 42min of daylight.
On the first day of December in Jaru, Brazil, sunrise is at 05:38 and sunset at 18:19. On the last day of the month, sunrise is at 05:51 and sunset at 18:34 -04.

Sunshine

In December, the average sunshine is 6.6h.

UV index

The months with the lowest UV index in Jaru are January through June, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 6 in December translates into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.