September weather forecast
Waterloo, Saint Vincent and the Grenadines

Weather in September

September, the first month of the autumn in Waterloo, is still a warm month, with an average temperature varying between 28.7°C (83.7°F) and 27.9°C (82.2°F).

Temperature

The warmest month is September, with an average high-temperature of 28.7°C (83.7°F) and an average low-temperature of 27.9°C (82.2°F).

Heat index

In September, the average heat index is appraised at a tropical 33°C (91.4°F). 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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, pregnancy), and activity. 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 especially crucial for babies and toddlers. 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 is 76%.

Rainfall

In Waterloo, during 14.9 rainfall days, 26mm (1.02") of precipitation is typically accumulated. Throughout the year, in Waterloo, Saint Vincent and the Grenadines, there are 164.4 rainfall days, and 289mm (11.38") of precipitation is accumulated.

Daylight

In Waterloo, the average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:15. On the last day of September, sunrise is at 05:53 and sunset at 17:55 AST.

Sunshine

In September, the average sunshine is 10.4h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Waterloo?

With an average high-temperature of 28.7°C (83.7°F) and an average low-temperature of 27.9°C (82.2°F), September is the warmest month in Waterloo, Saint Vincent and the Grenadines.

What is the temperature in September in Waterloo?

The average high-temperature, in September, in Waterloo, is 28.7°C (83.7°F), while the average low-temperature is 27.9°C (82.2°F). in September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is appraised at 33°C (91.4°F).

What is the average humidity in September in Waterloo?

In September, the average relative humidity is 76%.

How many days does it rain in September in Waterloo?

In Waterloo, Saint Vincent and the Grenadines, in September, it is raining for 14.9 days, with typically 26mm (1.02") of accumulated precipitation.

How many hours of daylight does Waterloo have in September?

In Waterloo, the average day length in September is 12h and 12min.

When is the sunrise / sunset in September in Waterloo?

On the first day of September, sunrise is at 05:53 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:55 AST.

How long on average sun shines in September in Waterloo?

In Waterloo, Saint Vincent and the Grenadines, the average sunshine duration in September is 10.4h.

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

The months with the highest UV index in Waterloo are January through December, with an average maximum UV index of 7.

When is the lowest UV index in Waterloo?

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

What is the UV index intensity in September in Waterloo?

In September, the average daily maximum UV index in Waterloo is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in September
Waterloo, Saint Vincent and the Grenadines

Average temperature in September - Waterloo, Saint Vincent and the Grenadines
  • Average high temperature in September: 28.7°C

The warmest month (with the highest average high temperature) is September (28.7°C).
The month with the lowest average high temperature is February (26.3°C).

  • Average low temperature in September: 27.9°C

The month with the highest average low temperature is September (27.9°C).
The coldest month (with the lowest average low temperature) is January (25.3°C).

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Average pressure in September
Waterloo, Saint Vincent and the Grenadines

Average pressure in September - Waterloo, Saint Vincent and the Grenadines
  • Average pressure in September: 1012.3mbar

The month with the highest atmospheric pressure is June (1014.6mbar).
The month with the lowest atmospheric pressure is November (1011.1mbar).

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Average wind speed in September
Waterloo, Saint Vincent and the Grenadines

Average wind speed in September - Waterloo, Saint Vincent and the Grenadines
  • Average wind speed in September: 19.7km/h

The windiest month (with the highest average wind speed) is February (28.4km/h).
The calmest month (with the lowest average wind speed) is September (19.7km/h).

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Average humidity in September
Waterloo, Saint Vincent and the Grenadines

Average humidity in September - Waterloo, Saint Vincent and the Grenadines
  • Average humidity in September: 76%

The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is February (75%).

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Average rainfall in September
Waterloo, Saint Vincent and the Grenadines

Average rainfall in September - Waterloo, Saint Vincent and the Grenadines
  • Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is November (40mm).
The driest month (with the least rainfall) is February (12mm).

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Average rainfall days in September
Waterloo, Saint Vincent and the Grenadines

Average rainfall days in September - Waterloo, Saint Vincent and the Grenadines
  • Average rainfall days in September: 14.9 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is February (8.7 days).

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Average daylight in September /
Average sunshine in September
Waterloo, Saint Vincent and the Grenadines

Average daylight in September / Average sunshine in September - Waterloo, Saint Vincent and the Grenadines
  • Average daylight in September: 12h and 12min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 22min).

  • Average sunshine in September: 10h and 24min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in September
Waterloo, Saint Vincent and the Grenadines

Average sunshine days in September - Waterloo, Saint Vincent and the Grenadines
  • Average sunshine days in September: 11.5 days

The month with the most sunshine days is March (16.7 days).
The month with the least sunshine days is July (10.1 days).

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Average UV index in September
Waterloo, Saint Vincent and the Grenadines

Average UV index in September - Waterloo, Saint Vincent and the Grenadines
  • 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
Waterloo, Saint Vincent and the Grenadines

Average cloud cover in September - Waterloo, Saint Vincent and the Grenadines
  • Average cloud cover in September: 35

The month with the most cloud cover is June (Cloud cover 44).
The months with the least cloud cover are February and September (Cloud cover 35).

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Average visibility in September
Waterloo, Saint Vincent and the Grenadines

Average visibility in September - Waterloo, Saint Vincent and the Grenadines
  • 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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