September weather forecast
Buenos Aires, Panama

The first month of the autumn, September, is also a moderately hot month in Buenos Aires, Panama, with an average temperature fluctuating between 23.2°C (73.8°F) and 29.5°C (85.1°F).

Temperature

On the advent of September, Buenos Aires's average high-temperature exhibits a minor adjustment to a still moderately hot 29.5°C (85.1°F) from August's 29.7°C (85.5°F). The low-temperature in Buenos Aires, Panama, averages to a still warm 23.2°C (73.8°F) during the nights of September.

Heat index

September's average heat index is computed to be a fiery hot 37°C (98.6°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In Buenos Aires, the average relative humidity in September is 85%.

Rainfall

In Buenos Aires, in September, during 28.3 rainfall days, 160mm (6.3") of precipitation is typically accumulated. In Buenos Aires, during the entire year, the rain falls for 261.2 days and collects up to 1359mm (53.5") of precipitation.

Daylight

The average length of the day in September in Buenos Aires is 12h and 10min.
On the first day of September, sunrise is at 06:11 and sunset at 18:27. On the last day of the month, sunrise is at 06:08 and sunset at 18:11 EST.

Sunshine

In Buenos Aires, the average sunshine in September is 8.2h.

UV index

January through September, November and December, 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 exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.