December weather forecast
Monterrico, Guatemala

Monterrico, Guatemala closes the year similar to how it started, with a decline in both temperature and rainfall compared to November. As the year draws to an end, residents and visitors are welcomed with a clear sky, balmy temperatures, and a gentle breeze. The amount of rainfall decreases to a mere 4mm (0.16") over 4.2 days, the second lowest after January. December is a significant month as it officially marks the end of the rainy season and the return of drier weather. The weather in Monterrico during December is ideal for all kinds of outdoor activities, making it a preferred month for travel and tourism.

Temperature

December's average high-temperature in Monterrico is a still hot 32.2°C (90°F), maintaining a close comparison with November's 32.1°C (89.8°F). Monterrico in December experiences a low-temperature average of 22.9°C (73.2°F).

Heat index

In December, the heat index is evaluated at a fiery hot 39°C (102.2°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In December, the average relative humidity in Monterrico, Guatemala, is 63%.

Rainfall

In Monterrico, in December, it is raining for 4.2 days, with typically 4mm (0.16") of accumulated precipitation. In Monterrico, during the entire year, the rain falls for 190.7 days and collects up to 718mm (28.27") of precipitation.

Sea temperature

In December, the average sea temperature is 29°C (84.2°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

The month with the shortest days in Monterrico is December, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:10 and sunset at 17:32. On the last day of December, in Monterrico, sunrise is at 06:25 and sunset at 17:44 CST.

Sunshine

With an average of 7.7h of sunshine, December has the least sunshine of the year in Monterrico, Guatemala.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Monterrico, Guatemala, are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be alert! The reflection of water and sand augments UV radiation intensity.