September weather forecast
Livingston, Guatemala

September gently steps into the post-monsoon season in Livingston. The month sees a sharp reduction in rainfall from August, 192mm (7.56") marking it's slow transition. The symptoms of the rainy season are evident with cooler temperatures and regular breezy intervals. Moving forward into October, a slight chill in the air can be anticipated. Despite the reduction in showers, the legacy of the rainy season lingers in the form of relatively cooler days and nights.

Temperature

The shift into September finds Livingston at an average high-temperature of a still tropical 30.5°C (86.9°F), closely comparable to August's conditions. In September, the average low-temperature records at a moderately hot 23.7°C (74.7°F) during the nights.

Heat index

The heat index in September is estimated at a blistering 40°C (104°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 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.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in September is 81%.

Rainfall

In September, the rain falls for 28.5 days. Throughout September, 192mm (7.56") of precipitation is accumulated. Throughout the year, there are 299.7 rainfall days, and 1707mm (67.2") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 29.8°C (85.6°F), September is the month with the warmest seawater.
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.

Daylight

In September, the average length of the day is 12h and 13min.
On the first day of September in Livingston, sunrise is at 05:42 and sunset at 18:07. On the last day of the month, sunrise is at 05:44 and sunset at 17:44 CST.

Sunshine

In September, the average sunshine in Livingston is 9h.

UV index

March through June, August and September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Alert! The Sun's UV rays are heightened by the reflection of sand and water.