September weather forecast
Heldens, Saint Kitts and Nevis

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Weather in September

September in Heldens witnesses the year’s highest rainfall amount reaching up to a significant 109mm (4.29"). This increase in rainfall from 73mm (2.87") in August characterizes the weather for the month. Transitioning from the consistently high temperatures of August, September begins to show signs of a gradual cooling trend. A slight reduction in daily sun hours and lower temperatures indicates the fading away of the hot season. Transitioning towards October, the weather begins its slow but steady march towards the year-end patterns characteristic of the wet season.

Temperature

With average high temperatures of 28.7°C (83.7°F) and lows of 27.7°C (81.9°F), September is the warmest month.

Heat index

September's mean heat index is calculated to be a tropical 33°C (91.4°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in September in Heldens is 77%.

Rainfall

In Heldens, in September, during 20.5 rainfall days, 91mm (3.58") of precipitation is typically accumulated. Throughout the year, there are 251.6 rainfall days, and 760mm (29.92") of precipitation is accumulated.

Daylight

The average length of the day in September in Heldens is 12h and 14min.
On the first day of September in Heldens, sunrise is at 05:57 and sunset at 18:24. On the last day of the month, sunrise is at 06:01 and sunset at 18:00 AST.

Sunshine

In September, the average sunshine is 9.4h.

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. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Frequently asked questions

What is the warmest month in Heldens?

September is the warmest month of the year in Heldens, registering average temperatures as high as 28.7°C (83.7°F) and as low as 27.7°C (81.9°F).

How hot does it get in Heldens in September?

During September, Heldens experiences an average high-temperature of 28.7°C (83.7°F) and a low-temperature of 27.7°C (81.9°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is calculated to be 33°C (91.4°F).

What is the average humidity in September in Heldens?

In September, the average relative humidity is 77%.

How much does it rain in Heldens in September?

In September, in Heldens, Saint Kitts and Nevis, the rain falls for 20.5 days. Throughout September, 91mm (3.58") of precipitation is accumulated.

What is the average length of the day in September in Heldens?

In September, the average day length in Heldens is 12h and 14min.

When are sunrise and sunset in September in Heldens?

In September, on the first day of the month, sunrise is at 05:57 and sunset at 18:24. On the last day of the month, in Heldens, sunrise is at 06:01 and sunset at 18:00 AST.

How long on average sun shines in September in Heldens?

In Heldens, the average sunshine duration in September is 9.4h.

What are the months with the highest UV index in Heldens?

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

What is the month with the lowest UV index in Heldens?

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

What is the UV index intensity in September in Heldens?

The average daily maximum UV index in September in Heldens is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.

Average temperature in September
Heldens, Saint Kitts and Nevis

Average temperature in September - Heldens, Saint Kitts and Nevis
  • 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 March (26°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 (25°C).

Average pressure in September
Heldens, Saint Kitts and Nevis

Average pressure in September - Heldens, Saint Kitts and Nevis
  • Average pressure in September: 1013.2mbar

The months with the highest atmospheric pressure are January, February and June (1016.2mbar).
The months with the lowest atmospheric pressure are October and November (1012.5mbar).

Average wind speed in September
Heldens, Saint Kitts and Nevis

Average wind speed in September - Heldens, Saint Kitts and Nevis
  • Average wind speed in September: 20.1km/h

The windiest month (with the highest average wind speed) is July (25.8km/h).
The calmest month (with the lowest average wind speed) is October (19.3km/h).

Average humidity in September
Heldens, Saint Kitts and Nevis

Average humidity in September - Heldens, Saint Kitts and Nevis
  • Average humidity in September: 77%

The months with the highest relative humidity are May, June, July and August (78%).
The months with the lowest relative humidity are January, February, March and December (75%).

Average rainfall in September
Heldens, Saint Kitts and Nevis

Average rainfall in September - Heldens, Saint Kitts and Nevis
  • Average rainfall in September: 91mm

The wettest month (with the highest rainfall) is October (109mm).
The driest month (with the least rainfall) is February (32mm).

Average rainfall days in September
Heldens, Saint Kitts and Nevis

Average rainfall days in September - Heldens, Saint Kitts and Nevis
  • Average rainfall days in September: 20.5 days

The month with the highest number of rainy days is November (23.8 days).
The month with the least rainy days is June (17.7 days).

Average daylight in September /
Average sunshine in September
Heldens, Saint Kitts and Nevis

Average daylight in September / Average sunshine in September - Heldens, Saint Kitts and Nevis
  • 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 2min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).

Average sunshine days in September
Heldens, Saint Kitts and Nevis

Average sunshine days in September - Heldens, Saint Kitts and Nevis
  • Average sunshine days in September: 6.4 days

The month with the most sunshine days is March (6.6 days).
The month with the least sunshine days is November (3 days).

Average UV index in September
Heldens, Saint Kitts and Nevis

Average UV index in September - Heldens, Saint Kitts and Nevis
  • 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
Heldens, Saint Kitts and Nevis

Average cloud cover in September - Heldens, Saint Kitts and Nevis
  • Average cloud cover in September: 38

The months with the most cloud cover are May and June (Cloud cover 43).
The months with the least cloud cover are February and March (Cloud cover 35).

Average visibility in September
Heldens, Saint Kitts and Nevis

Average visibility in September - Heldens, Saint Kitts and Nevis
  • 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).

Heldens, Saint Kitts and Nevis

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