December weather forecast
Óbidos, Brazil

The first month of the summer, December, is also a hot month in Óbidos, Brazil, with an average temperature ranging between max 33.5°C (92.3°F) and min 24.2°C (75.6°F).

Temperature

At the onset of December, Óbidos records an average high-temperature of a hot 33.5°C (92.3°F), showing little deviation from the preceding month. Óbidos, during the month of December, experiences an average low-temperature of 24.2°C (75.6°F).

Heat index

Throughout December, the heat index is evaluated at a blazing hot 45°C (113°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
It is important to note that the heat index values are for shaded areas and light wind scenarios. 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', is achieved by amalgamating air temperature with the relative humidity readings. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In December, the average relative humidity in Óbidos is 69%.

Rainfall

In Óbidos, during December, the rain falls for 17.5 days and regularly aggregates up to 82mm (3.23") of precipitation. Throughout the year, there are 212.5 rainfall days, and 1026mm (40.39") of precipitation is accumulated.

Daylight

With an average of 12h and 12min of daylight, December has the longest days of the year in Óbidos.
On the first day of the month, sunrise is at 06:24 and sunset at 18:38. On the last day of December, sunrise is at 06:38 and sunset at 18:52 -03.

Sunshine

In December, the average sunshine in Óbidos, Brazil, is 8.2h.

UV index

In Óbidos, the average daily maximum UV index in December is 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. 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. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.