September weather forecast
Balboa, Panama

September

Weather in September

Weather in September marks a slight easing in the rainy season for Balboa, Panama, with a decrease in rainfall to 182mm (7.17") compared to the previous month. Temperatures begin to cool slightly, along with sunlight hours reducing, marking the transition towards the year-end. However, humidity levels remain constant, ensuring the tropical feel continues. Breezy conditions persist due to the wind, providing a smidgen of freshness. The UV index remains steady, indicating the need for continuous sun protection.

Temperature

Balboa in September witnesses an average high-temperature of a still warm 28.9°C (84°F), indicating a slight variation from August's 29°C (84.2°F). Balboa registers a steady nighttime temperature averaging a still warm 24.3°C (75.7°F) throughout September.

Heat index

The average heat index in September is calculated to be a fiery hot 36°C (96.8°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In Balboa, in September, during 28 rainfall days, 182mm (7.17") of precipitation is typically accumulated. In Balboa, during the entire year, the rain falls for 294.6 days and collects up to 1899mm (74.76") of precipitation.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of September, sunrise is at 06:09 and sunset at 18:26. On the last day of the month, sunrise is at 06:06 and sunset at 18:09 EST.

Sunshine

In Balboa, the average sunshine in September is 8.1h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Balboa. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Frequently asked questions

How hot is it in September?
During September, Balboa experiences an average high-temperature of 28.9°C (84°F) and a low-temperature of 24.3°C (75.7°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 36°C (96.8°F).
What is the average humidity in September in Balboa?
In September, the average relative humidity is 85%.
How much does it rain in September?
In Balboa, in September, it is raining for 28 days, with typically 182mm (7.17") of accumulated precipitation.
How many hours of daylight does Balboa have in September?
In Balboa, the average day length in September is 12h and 10min.
When is the sunrise / sunset in September?
On the first day of September in Balboa, sunrise is at 06:09 and sunset at 18:26. On the last day of the month, sunrise is at 06:06 and sunset at 18:09 EST.
How many hours of sunshine does Balboa have in September?
The average sunshine duration in September is 8.1h.
When is the highest UV index in Balboa?
January through December, with an average maximum UV index of 7, are months with the highest UV index in Balboa.
When is the lowest UV index?
January through December, with an average maximum UV index of 7, are months with the lowest UV index in Balboa.
What is the UV index intensity in September?
In Balboa, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Balboa, Panama
  • Average high temperature in September: 28.9°C

The warmest month (with the highest average high temperature) is April (30.5°C).
The month with the lowest average high temperature is November (28.6°C).

  • Average low temperature in September: 24.3°C

The month with the highest average low temperature is June (25.2°C).
The coldest month (with the lowest average low temperature) is February (23.8°C).

Average pressure in September
Balboa, Panama
  • Average pressure in September: 1010mbar

The month with the highest atmospheric pressure is March (1011mbar).
The month with the lowest atmospheric pressure is November (1009.6mbar).

Average wind speed in September
Balboa, Panama
  • Average wind speed in September: 6.4km/h

The windiest month (with the highest average wind speed) is February (12.7km/h).
The calmest month (with the lowest average wind speed) is September (6.4km/h).

Average humidity in September
Balboa, Panama
  • Average humidity in September: 85%

The month with the highest relative humidity is July (87%).
The month with the lowest relative humidity is March (77%).

Average rainfall in September
Balboa, Panama
  • Average rainfall in September: 182mm

The wettest month (with the highest rainfall) is July (269mm).
The driest month (with the least rainfall) is February (13mm).

Average rainfall days in September
Balboa, Panama
  • Average rainfall days in September: 28 days

The month with the highest number of rainy days is July (30.1 days).
The month with the least rainy days is February (11.3 days).

Average daylight in September /
Average sunshine in September
Balboa, Panama
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 36min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is May (Average sunshine: 9h and 0min).
The month with the least sunshine is November (Average sunshine: 5h and 54min).

Average sunshine days in September
Balboa, Panama
  • Average sunshine days in September: 1.8 days

The month with the most sunshine days is March (11.3 days).
The months with the least sunshine days are July and November (0.4 days).

Average UV index in September
Balboa, Panama
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in September
Balboa, Panama
  • Average cloud cover in September: 43

The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is February (Cloud cover 39).

Average visibility in September
Balboa, Panama
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March and April (10km).
The months with the lowest visibility are May, June, July, August, September, October, November and December (9km).

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