September weather forecast
Quebradillas, PR

Weather in September

September, the first month of the autumn in Quebradillas, is still a warm month, with temperature in the range of an average low of 79°F (26.1°C) and an average high of 84.9°F (29.4°C).

Temperature

The warmest month is September, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 79°F (26.1°C).

Heat index

The average heat index in September is evaluated at a torrid 96.1°F (35.6°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', 'felt air temperature', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, metabolic differences, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in September is 79%.

Rainfall

In Quebradillas, Puerto Rico, during 21.7 rainfall days, 5.16" (131mm) of precipitation is typically accumulated. Throughout the year, there are 229.7 rainfall days, and 40" (1016mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Quebradillas is 12h and 14min.
On the first day of the month, sunrise is at 6:13 am and sunset at 6:42 pm. On the last day of September, in Quebradillas, sunrise is at 6:18 am and sunset at 6:17 pm AST.

Sunshine

The average sunshine in September in Quebradillas is 9.2h.

UV index

The months with the highest UV index in Quebradillas are March through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the warmest month in Quebradillas?

September is the warmest month in Quebradillas, Puerto Rico, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 79°F (26.1°C).

What is the temperature in September in Quebradillas?

In Quebradillas, in September, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 79°F (26.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in September is evaluated at 96.1°F (35.6°C).

What is the average humidity in September in Quebradillas?

In Quebradillas, the average relative humidity in September is 79%.

How much does it rain in Quebradillas in September?

In Quebradillas, in September, it is raining for 21.7 days, with typically 5.16" (131mm) of accumulated precipitation.

How many hours of daylight does Quebradillas have in September?

In Quebradillas, Puerto Rico, the average day length in September is 12h and 14min.

When is the sunrise / sunset in September in Quebradillas?

On the first day of September, sunrise is at 6:13 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 6:17 pm AST.

How many hours of sunshine does Quebradillas have in September?

The average sunshine duration in September in Quebradillas is 9.2h.

What is the month with the highest UV index in Quebradillas?

March through November, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in September in Quebradillas?

In Quebradillas, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.

Average temperature in September
Quebradillas, PR

Average temperature in September - Quebradillas, PR
  • Average high temperature in September: 84.9°F

The warmest month (with the highest average high temperature) is September (84.9°F).
The month with the lowest average high temperature is March (80.1°F).

  • Average low temperature in September: 79°F

The months with the highest average low temperature are August, September and October (79°F).
The coldest month (with the lowest average low temperature) is March (73.6°F).

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Average pressure in September
Quebradillas, PR

Average pressure in September - Quebradillas, PR
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).

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Average wind speed in September
Quebradillas, PR

Average wind speed in September - Quebradillas, PR
  • Average wind speed in September: 8.4mph

The windiest month (with the highest average wind speed) is December (11.7mph).
The calmest month (with the lowest average wind speed) is October (7.9mph).

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Average humidity in September
Quebradillas, PR

Average humidity in September - Quebradillas, PR
  • Average humidity in September: 79%

The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is March (76%).

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Average rainfall in September
Quebradillas, PR

Average rainfall in September - Quebradillas, PR
  • Average rainfall in September: 5.16"

The wettest month (with the highest rainfall) is May (5.87").
The driest month (with the least rainfall) is January (0.98").

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Average rainfall days in September
Quebradillas, PR

Average rainfall days in September - Quebradillas, PR
  • Average rainfall days in September: 21.7 days

The month with the highest number of rainy days is May (25.7 days).
The month with the least rainy days is December (12.6 days).

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Average daylight in September /
Average sunshine in September
Quebradillas, PR

Average daylight in September / Average sunshine in September - Quebradillas, PR
  • Average daylight in September: 12h and 14min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 2min).

  • Average sunshine in September: 9.2h

The month with the most sunshine is June (Average sunshine: 10.5h).
The month with the least sunshine is November (Average sunshine: 6.8h).

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Average sunshine days in September
Quebradillas, PR

Average sunshine days in September - Quebradillas, PR
  • Average sunshine days in September: 6.4 days

The month with the most sunshine days is January (15.3 days).
The month with the least sunshine days is May (3.7 days).

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Average UV index in September
Quebradillas, PR

Average UV index in September - Quebradillas, PR
  • Average UV index in September: 7

The months with the highest UV index are March, April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February and December (UV index 6).

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Average cloud cover in September
Quebradillas, PR

Average cloud cover in September - Quebradillas, PR
  • Average cloud cover in September: 25

The month with the most cloud cover is May (Cloud cover 33).
The months with the least cloud cover are January, February, September and December (Cloud cover 25).

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Average visibility in September
Quebradillas, PR

Average visibility in September - Quebradillas, PR
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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