December weather forecast
Muritiba, Brazil

December, the first month of the summer in Muritiba, is a tropical month, with an average temperature varying between 20.9°C (69.6°F) and 30.7°C (87.3°F).

Temperature

The ushering in of December brings an average high-temperature of a tropical 30.7°C (87.3°F), closely mirroring the 29.7°C (85.5°F) of November. Muritiba reports an average nighttime low-temperature of 20.9°C (69.6°F) in December.

Heat index

For most parts of December, the heat index is evaluated at a fiery hot 39°C (102.2°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, in Muritiba, the rain falls for 18.6 days. Throughout December, 52mm (2.05") of precipitation is accumulated. In Muritiba, during the entire year, the rain falls for 253.4 days and collects up to 562mm (22.13") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 54min of daylight.
On the first day of the month, sunrise is at 05:00 and sunset at 17:49. On the last day of December, sunrise is at 05:13 and sunset at 18:04 -03.

Sunshine

The average sunshine in December is 7.6h.

UV index

In Muritiba, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.