December weather forecast
Guajará-Mirim, Brazil

December, the first month of the summer in Guajará-Mirim, is still a hot month, with an average temperature ranging between min 22.6°C (72.7°F) and max 30.5°C (86.9°F).

Temperature

The advent of December observes an average high-temperature of a still hot 30.5°C (86.9°F), nearly identical to November's 32.3°C (90.1°F). During December, Guajará-Mirim witnesses a consistent average low-temperature of 22.6°C (72.7°F).

Heat index

During December, the heat index is computed to be a blistering 41°C (105.8°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Guajará-Mirim, the average relative humidity in December is 85%.

Rainfall

In Guajará-Mirim, during December, the rain falls for 27.8 days and regularly aggregates up to 171mm (6.73") of precipitation. Throughout the year, there are 228.5 rainfall days, and 1170mm (46.06") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of December in Guajará-Mirim, sunrise is at 05:49 and sunset at 18:31. On the last day of the month, sunrise is at 06:02 and sunset at 18:46 -04.

Sunshine

In Guajará-Mirim, the average sunshine in December is 7.2h.

UV index

July through December, with an average maximum UV index of 7, are months with the highest UV index in Guajará-Mirim. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 7 in December transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.