December weather forecast
Maria Helena, Brazil

December, the first month of the summer in Maria Helena, is still a warm month, with an average temperature ranging between max 29.9°C (85.8°F) and min 20.6°C (69.1°F).

Temperature

December is Maria Helena's warmest month, registering average high temperatures of 29.9°C (85.8°F) and lows of 20.6°C (69.1°F).

Heat index

The heat index in December is estimated at a fiery hot 37°C (98.6°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Maria Helena, the average relative humidity in December is 80%.

Rainfall

In Maria Helena, in December, during 20.5 rainfall days, 125mm (4.92") of precipitation is typically accumulated. Throughout the year, there are 176.1 rainfall days, and 1057mm (41.61") of precipitation is accumulated.

Daylight

The month with the longest days in Maria Helena, Brazil, is December, with an average of 13h and 36min of daylight.
On the first day of December in Maria Helena, sunrise is at 05:37 and sunset at 19:06. On the last day of the month, sunrise is at 05:49 and sunset at 19:23 -03.

Sunshine

In December, the average sunshine in Maria Helena is 8.4h.

UV index

January through March, August through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In December, a regular UV index of 6 translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.