January weather forecast
Monterrico, Guatemala

Monterrico, Guatemala begins the year with a bit of chill; however, the temperatures are generally mild, and the climate remains relatively comfortable. This time of year often finds visitors taking long walks on the coastal beaches or engaging in various water sports due to a lower rainfall level. Out of all the months of the year, January receives the least amount of rainfall measured in millimeters and days, making it from 3mm (0.12") for 3.1days, perfect for outdoor activities. The atmospheric conditions are pleasing, with an average amount of sunlight illuminating the city for most of the day. Monterrico's weather in January is reliably predictable, with minimal rainfall and cool temperatures ensuring a pleasant start to the year.

Temperature

As Monterrico welcomes January, the average high-temperature is noted at a still tropical 32.1°C (89.8°F), closely aligning with the preceding month. During January, the average low-temperature is recorded at a pleasant 22.7°C (72.9°F).

Heat index

In January, the average heat index is evaluated at a very hot 38°C (100.4°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

In Monterrico, the average relative humidity in January is 61%.

Rainfall

The month with the least rainfall is January, when the rain falls for 3.1 days and typically collects 3mm (0.12") of precipitation.

Sea temperature

January and February, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

In Monterrico, the average length of the day in January is 11h and 25min.
On the first day of January in Monterrico, sunrise is at 06:25 and sunset at 17:45. On the last day of the month, sunrise is at 06:29 and sunset at 18:01 CST.

Sunshine

In January, the average sunshine is 8.1h.

UV index

The months with the highest UV index in Monterrico are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Monterrico are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index, 7 during January, leads to the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.