December weather forecast
Mazatenango, Guatemala

December completes the annual weather cycle in Mazatenango with the formal termination of the monsoons and the return to a drier climate. The city records the least rainfall of 17mm (0.67") alongside an increased number of sunlit days. The temperature oscillates in a fairly moderate range, mingling coolness with warmth. A decline in humidity underlines the arid environment, backing the shift towards the dry season. Consequently, December instills the festive spirit with clear skies and warm sunshine in Mazatenango.

Temperature

December in Mazatenango, Guatemala, denotes a minimal variation in the average high-temperature to a still moderately hot 29.5°C (85.1°F) from November's 29.3°C (84.7°F). Throughout the nights in December, an average low-temperature of 17.6°C (63.7°F) is noted.

Heat index

The heat index value during December is computed to be a hot 32°C (89.6°F). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for 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.

Humidity

The average relative humidity in December in Mazatenango is 63%.

Rainfall

In Mazatenango, in December, it is raining for 7.6 days, with typically 17mm (0.67") of accumulated precipitation. Throughout the year, there are 222.8 rainfall days, and 1491mm (58.7") of precipitation is accumulated.

Daylight

The month with the shortest days is December, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:15 and sunset at 17:35. On the last day of December, sunrise is at 06:30 and sunset at 17:47 CST.

Sunshine

The average sunshine in December is 7.5h.

UV index

The months with the highest UV index in Mazatenango, Guatemala, are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index in Mazatenango. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 6 in December transforms into the following instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.