December weather forecastCanoas, Brazil

Weather in December

December, the first month of the summer in Canoas, is still a warm month, with an average temperature varying between 19°C (66.2°F) and 29.8°C (85.6°F).

Temperature

Canoas experiences a minor change to a still moderately hot 29.8°C (85.6°F) in average high-temperature during December, closely reflecting November. December witnesses an average nighttime temperature of 19°C (66.2°F).

Heat index

The heat index in December is computed to be a very hot 35°C (95°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

With an average relative humidity of 71%, December is the least humid month.

Rainfall

In Canoas, Brazil, during December, the rain falls for 13.7 days and regularly aggregates up to 60mm (2.36") of precipitation. In Canoas, Brazil, during the entire year, the rain falls for 148.3 days and collects up to 805mm (31.69") of precipitation.

Daylight

December has the longest days of the year, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 05:16 and sunset at 19:11. On the last day of December, in Canoas, sunrise is at 05:26 and sunset at 19:29 -03.

Sunshine

With an average of 8.3h of sunshine, December has the most sunshine of the year.

UV index

With an average maximum UV index of 7, December is the month with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.