December weather forecast
Canutama, Brazil

The first month of the summer, December, is also a hot month in Canutama, Brazil, with temperature in the range of an average high of 30.6°C (87.1°F) and an average low of 23.1°C (73.6°F).

Temperature

December's commencement is accompanied by an average high-temperature of a still hot 30.6°C (87.1°F), diverging marginally from November's 32.5°C (90.5°F). Throughout the nights in December, an average low-temperature of 23.1°C (73.6°F) is noted in Canutama.

Heat index

In December, the average heat index is estimated at a scorching 42°C (107.6°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In December, the average relative humidity in Canutama is 87%.

Rainfall

In Canutama, in December, it is raining for 26.4 days, with typically 162mm (6.38") of accumulated precipitation. Throughout the year, there are 232.3 rainfall days, and 1127mm (44.37") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 30min of daylight.
On the first day of December in Canutama, sunrise is at 05:52 and sunset at 18:21. On the last day of the month, sunrise is at 06:05 and sunset at 18:35 -04.

Sunshine

In December, the average sunshine is 6.8h.

UV index

January through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: An average UV index of 6 in December transforms into this advice:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.