September weather forecast
Villalba, PR

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Weather in September

September in Villalba sees a mild drop in temperatures from August. Albeit, rainfall remains high surpassing previous month, scoring at 4.45" (113mm). Despite the increased showers, the city's vibrant experiences are far from dulled. Continuous gusts, somewhat slowed from August's speed, blend in seamlessly, assisting in making the weather enjoyable.

Temperature

September's beginning signals an average high-temperature of a warm 85.8°F (29.9°C), barely different from August's 86.5°F (30.3°C). In the month of September, the nighttime temperature dips to a steady average of 75.7°F (24.3°C).

Heat index

For September, the heat index is evaluated at a fiery hot 98.6°F (37°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Villalba, the average relative humidity in September is 80%.

Rainfall

September is the month with the most rainfall in Villalba, Puerto Rico. Rain falls for 22.7 days and accumulates 4.45" (113mm) of precipitation.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September in Villalba, sunrise is at 6:11 am and sunset at 6:39 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 6:15 pm AST.

Sunshine

In Villalba, the average sunshine in September is 9.2h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index in Villalba. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average 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. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September in Villalba?

An average high-temperature, in September, in Villalba, is 85.8°F (29.9°C) and the average low-temperature is 75.7°F (24.3°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 98.6°F (37°C).

What is the average humidity in September in Villalba?

In September, the average relative humidity is 80%.

What is the wettest month in Villalba?

September is the month with the most rainfall in Villalba, Puerto Rico. Rain falls for 22.7 days and accumulates 4.45" (113mm) of precipitation.

How many days does it rain in September in Villalba?

In September, in Villalba, Puerto Rico, the rain falls for 22.7 days. Throughout September, 4.45" (113mm) of precipitation is accumulated.

How many hours of daylight does Villalba have in September?

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

When are sunrise and sunset in September in Villalba?

In September, on the first day of the month, sunrise is at 6:11 am and sunset at 6:39 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 6:15 pm AST.

How long on average sun shines in September in Villalba?

In September, the average sunshine duration in Villalba, Puerto Rico, is 9.2h.

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

The months with the highest UV index in Villalba, Puerto Rico, are May through October, with an average maximum UV index of 7.

What is the UV index reading in September in Villalba?

The average daily maximum UV index in September in Villalba is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Villalba, PR

Average temperature in September - Villalba, PR
  • Average high temperature in September: 85.8°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is January (81°F).

  • Average low temperature in September: 75.7°F

The month with the highest average low temperature is August (76.6°F).
The coldest months (with the lowest average low temperature) are February and March (70.9°F).

Average pressure in September
Villalba, PR

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

The months with the highest atmospheric pressure are January and February (30.01"Hg).
The months with the lowest atmospheric pressure are October and November (29.9"Hg).

Average wind speed in September
Villalba, PR

Average wind speed in September - Villalba, PR
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is July (8mph).
The calmest month (with the lowest average wind speed) is November (5.5mph).

Average humidity in September
Villalba, PR

Average humidity in September - Villalba, PR
  • Average humidity in September: 80%

The month with the highest relative humidity is November (81%).
The month with the lowest relative humidity is March (76%).

Average rainfall in September
Villalba, PR

Average rainfall in September - Villalba, PR
  • Average rainfall in September: 4.45"

The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (0.83").

Average rainfall days in September
Villalba, PR

Average rainfall days in September - Villalba, PR
  • Average rainfall days in September: 22.7 days

The month with the highest number of rainy days is October (24.8 days).
The month with the least rainy days is February (15 days).

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

Average daylight in September / Average sunshine in September - Villalba, PR
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 54min).

Average sunshine days in September
Villalba, PR

Average sunshine days in September - Villalba, PR
  • Average sunshine days in September: 3.6 days

The month with the most sunshine days is March (7.6 days).
The month with the least sunshine days is October (2.6 days).

Average UV index in September
Villalba, PR

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

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

Average cloud cover in September
Villalba, PR

Average cloud cover in September - Villalba, PR
  • Average cloud cover in September: 27

The month with the most cloud cover is May (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 25).

Average visibility in September
Villalba, PR

Average visibility in September - Villalba, 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).

Villalba, Puerto Rico, USA

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