September weather forecast
Monterrico, Guatemala

With September comes a continuation of the prominent rainy season in Monterrico. An increase in rainfall and a general decrease in sunny hours from the preceding month characterize Monterrico as we move onto the later part of the year. Despite September experiencing 110mm (4.33") of rainfall over 26.2 days, it manages to sustain its tropical charisma. The lush green landscapes draped under overcast sky present a spectacular vista for nature enthusiasts. Monterrico's weather in September experiences short moments of bright sunshine followed by refreshing rain showers.

Temperature

With September's arrival, Monterrico's weather records an average high-temperature of a still tropical 32°C (89.6°F), marking little difference from August's 32.6°C (90.7°F). During September, Monterrico sees a mean low-temperature of 24.5°C (76.1°F).

Heat index

The heat index in September is evaluated at a scorching 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 74%.

Rainfall

In Monterrico, in September, it is raining for 26.2 days, with typically 110mm (4.33") of accumulated precipitation. Throughout the year, there are 190.7 rainfall days, and 718mm (28.27") of precipitation is accumulated.

Sea temperature

In Monterrico, in September, the average water temperature is 29°C (84.2°F).
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of the month, sunrise is at 05:50 and sunset at 18:13. On the last day of September, in Monterrico, sunrise is at 05:51 and sunset at 17:51 CST.

Sunshine

In September, the average sunshine in Monterrico is 10.4h.

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 are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take note! The UV strength of the Sun elevates when reflected off water and sand.