September weather - Autumn 2023 - Road Town, British Virgin Islands

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

A view of the Road Town in the British Virgin Islands from the Mount Sage National Park in Tortola

Weather in September

September brings a bit of respite from the scorching heat of August in Road Town. A slight decrease in temperature is observed, ushering a calm and pleasant charm to the tropical city. The winds retain their cooling effect, balancing the overall warmth of the city. Simultaneously, rainfall hits a year-long high, yet failing to disrupt the overall ambient weather. The temperature in September fluctuates between 27.7°C and 28.9°C, signaling the onset of the retreating summer.

Temperature

September, having an average high-temperature of 28.9°C and an average low-temperature of 27.7°C, is the warmest month in Road Town.

Heat index

In September, the average heat index is evaluated at a tropical 34°C. Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to 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.

Humidity

In September, the average relative humidity in Road Town is 77%.

Rainfall

In Road Town, in September, during 23.4 rainfall days, 110mm of precipitation is typically accumulated. In Road Town, during the entire year, the rain falls for 262.1 days and collects up to 835mm of precipitation.

Daylight

In Road Town, the average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 06:03 and sunset at 18:33. On the last day of September, sunrise is at 06:08 and sunset at 18:08 AST.

Sunshine

The average sunshine in September in Road Town is 8.6h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Road Town. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Road Town. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

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FAQ

What time of the year is the hottest in Road Town?

In Road Town, September is identified by the average highest temperatures, reaching a peak of 28.9°C and a low of 27.7°C.

How hot does it get in Road Town in September?

During September, Road Town experiences an average high-temperature of 28.9°C and a low-temperature of 27.7°C. In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is evaluated at 34°C.

What is the average humidity in September in Road Town?

In Road Town, British Virgin Islands, the average relative humidity in September is 77%.

How many days does it rain in September in Road Town?

In Road Town, British Virgin Islands, in September, during 23.4 rainfall days, 110mm of precipitation is typically accumulated.

How many hours of daylight does Road Town have in September?

In Road Town, British Virgin Islands, the average day length in September is 12h and 14min.

What time are sunrise and sunset in September in Road Town?

In September, on the first day of the month, sunrise is at 06:03 and sunset at 18:33. On the last day of the month, in Road Town, sunrise is at 06:08 and sunset at 18:08 AST.

How many hours of sunshine does Road Town have in September?

In September, the average sunshine duration in Road Town, British Virgin Islands, is 8.6h.

What is the month with the highest UV index in Road Town?

The months with the highest UV index in Road Town, British Virgin Islands, are January through December, with an average maximum UV index of 7.

What are the months with the lowest UV index in Road Town?

January through December, with an average maximum UV index of 7, are months with the lowest UV index in Road Town.

How high is the UV index in September in Road Town?

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

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

28.8°C

28.9°C

28.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

24.1km/h

19.6km/h

19.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

1.7

3.5

4.4

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Road Town, British Virgin Islands

Average high temperature in September: 28.9°C

The warmest month (with the highest average high temperature) is September (28.9°C).
The months with the lowest average high temperature are February and March (25.9°C).

Average low temperature in September: 27.7°C

The month with the highest average low temperature is October (27.8°C).
The coldest month (with the lowest average low temperature) is March (24.7°C).

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Average pressure in September
Road Town, British Virgin Islands

Average pressure in September: 1013.5mbar

The month with the highest atmospheric pressure is January (1016.7mbar).
The month with the lowest atmospheric pressure is October (1012.7mbar).

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Average wind speed in September
Road Town, British Virgin Islands

Average wind speed in September: 19.1km/h

The windiest month (with the highest average wind speed) is July (24.4km/h).
The calmest month (with the lowest average wind speed) is October (18.2km/h).

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Average humidity in September
Road Town, British Virgin Islands

Average humidity in September: 77%

The months with the highest relative humidity are June and July (79%).
The months with the lowest relative humidity are January, February, March, October and December (75%).

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Average rainfall in September
Road Town, British Virgin Islands

Average rainfall in September: 110mm

The wettest months (with the highest rainfall) are August and October (113mm).
The driest month (with the least rainfall) is February (28mm).

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Average rainfall days in September
Road Town, British Virgin Islands

Average rainfall days in September: 23.4 days

The month with the highest number of rainy days is November (24.9 days).
The month with the least rainy days is February (17.5 days).

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Average daylight in September /
Average sunshine in September
Road Town, British Virgin Islands

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 0min).

Average sunshine in September: 8h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

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Average sunshine days in September
Road Town, British Virgin Islands

Average sunshine days in September: 3.5 days

The month with the most sunshine days is February (7.1 days).
The month with the least sunshine days is August (1.7 days).

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Average UV index in September
Road Town, British Virgin Islands

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).

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Average cloud cover in September
Road Town, British Virgin Islands

Average cloud cover in September: 37

The months with the most cloud cover are May, July and August (Cloud cover 41).
The month with the least cloud cover is February (Cloud cover 34).

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Average visibility in September
Road Town, British Virgin Islands

Average visibility in September: 10km

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

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September weather forecast
Road Town, British Virgin Islands

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