December weather forecast
Salgueiro, Brazil

December, the first month of the summer in Salgueiro, is also a hot month, with an average temperature fluctuating between 32.8°C (91°F) and 23°C (73.4°F).

Temperature

At the onset of December, Salgueiro records an average high-temperature of a still hot 32.8°C (91°F), showing little deviation from the preceding month. Throughout December, the average low-temperature in Salgueiro dips to a warm 23°C (73.4°F).

Heat index

December's average heat index is computed to be a sweltering 37°C (98.6°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting 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.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. 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. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In December, the average relative humidity in Salgueiro is 53%.

Rainfall

In Salgueiro, in December, during 12.8 rainfall days, 59mm (2.32") of precipitation is typically accumulated. Throughout the year, there are 147.6 rainfall days, and 486mm (19.13") of precipitation is accumulated.

Daylight

With an average of 12h and 36min of daylight, December has the longest days of the year in Salgueiro.
On the first day of December, sunrise is at 05:08 and sunset at 17:42. On the last day of the month, sunrise is at 05:22 and sunset at 17:57 -03.

Sunshine

In December, the average sunshine in Salgueiro is 8.7h.

UV index

The months with the highest UV index are January through March, September through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.