September weather forecast
Portobelillo, Panama

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

Temperature

The onset of September brings with it an average high-temperature of a still warm 29.8°C (85.6°F), showing a negligible variation from the month before. September nights in Portobelillo, Panama, cool down to an average low-temperature of 22.4°C (72.3°F).

Heat index

The heat index value during September is computed to be a fiery hot 39°C (102.2°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

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. In Portobelillo, during the entire year, the rain falls for 269.3 days and collects up to 2235mm (87.99") of precipitation.

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 in Portobelillo, Panama, are January through June and September, with an average maximum UV index of 7. 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: In September, an average UV index of 7 transforms into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.