September weather forecastPortobelillo, Panama

Weather in September

The first month of the autumn, September, is also a moderately hot month in Portobelillo, Panama, with temperature in the range of an average low of 22.4°C (72.3°F) and an average high of 29.8°C (85.6°F).

Temperature

Portobelillo starts September with an average high-temperature of a still warm 29.8°C (85.6°F), a minor shift from August's 29.6°C (85.3°F). September sees the temperature falling to a mean low of 22.4°C (72.3°F).

Heat index

The heat index value during September is computed to be a very hot 39°C (102.2°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. 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 highly critical to babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The months with the highest humidity are July through October, with an average relative humidity of 88%.

Rainfall

In Portobelillo, in September, during 29.5 rainfall days, 262mm (10.31") of precipitation is typically accumulated. Throughout the year, there are 269.3 rainfall days, and 2235mm (87.99") of precipitation is accumulated.

Daylight

In Portobelillo, the average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 06:14 and sunset at 18:30. On the last day of the month, sunrise is at 06:10 and sunset at 18:13 EST.

Sunshine

In September, the average sunshine is 7.4h.

UV index

The months with the highest UV index are January through June and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.