December weather forecast
Simão Dias, Brazil

The first month of the summer, December, is also a hot month in Simão Dias, Brazil, with an average temperature fluctuating between 31.8°C (89.2°F) and 21.5°C (70.7°F).

Temperature

The average high-temperature during December is a still hot 31.8°C (89.2°F), almost matching the conditions of the preceding month. During December nights, Simão Dias records an average temperature of 21.5°C (70.7°F).

Heat index

For most parts of December, the heat index is appraised at an extremely hot 41°C (105.8°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Understand that the heat index values take into account shaded locations and mild winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. 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 extremely significant for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The months with the lowest humidity in Simão Dias are January through March and December, with an average relative humidity of 73%.

Rainfall

In December, the rain falls for 11.4 days. Throughout December, 26mm (1.02") of precipitation is accumulated. In Simão Dias, during the entire year, the rain falls for 214 days and collects up to 444mm (17.48") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of December, sunrise is at 04:59 and sunset at 17:41. On the last day of the month, sunrise is at 05:12 and sunset at 17:56 -03.

Sunshine

In December, the average sunshine is 7.6h.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A typical high UV index of 7 in December suggests the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.