September weather forecast
Long Ground, Montserrat

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Weather in September

In September, weather conditions start to cool off in Montserrat. Despite reaching its annual peak at 28.9°C (84°F), the evenings grow cooler as temperatures drop to 27.8°C (82°F). The average wind speed decreases to 20.5km/h (12.7mph), which is the lowest of the year. September sees the longest daylight hours, standing at 13 hours. Interestingly, despite the high temperatures, September remains the most humid month, with relative humidity reaching 78%.

Temperature

With average high temperatures of 28.9°C (84°F) and lows of 27.8°C (82°F), September is the warmest month.

Heat index

The heat index for September is evaluated at a tropical 34°C (93.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Long Ground, during September, the rain falls for 23.2 days and regularly aggregates up to 87mm (3.43") of precipitation. In Long Ground, Montserrat, during the entire year, the rain falls for 266.4 days and collects up to 724mm (28.5") of precipitation.

Daylight

In September, the average length of the day in Long Ground is 12h and 13min.
On the first day of September, sunrise is at 05:55 and sunset at 18:21. On the last day of the month, sunrise is at 05:58 and sunset at 17:58 AST.

Sunshine

The average sunshine in September is 10.8h.

UV index

The months with the highest UV index in Long Ground are January through December, with an average maximum UV index of 7. 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 threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Feb 6, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What month is the hottest in Long Ground?

September is the month that records the highest temperatures, with averages ranging from a high of 28.9°C (84°F) to a low of 27.8°C (82°F).

How hot does it get in Long Ground in September?

September temperatures in Long Ground, Montserrat, vary between a high-temperature of 28.9°C (84°F) and a low-temperature of 27.8°C (82°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 34°C (93.2°F).

What is the average humidity in September in Long Ground?

The average relative humidity in September in Long Ground, Montserrat, is 76%.

How much does it rain in Long Ground in September?

In Long Ground, Montserrat, in September, during 23.2 rainfall days, 87mm (3.43") of precipitation is typically accumulated.

What is the average length of the day in September in Long Ground?

In September, the average day length is 12h and 13min.

What time are sunrise and sunset in September in Long Ground?

In September, on the first day of the month, sunrise is at 05:55 and sunset at 18:21. On the last day of the month, in Long Ground, Montserrat, sunrise is at 05:58 and sunset at 17:58 AST.

How many hours of sunshine does Long Ground have in September?

The average sunshine duration in September is 10.8h.

What are the months with the highest UV index in Long Ground?

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

When is the lowest UV index in Long Ground?

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

What is the UV index intensity in September in Long Ground?

In Long Ground, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Long Ground, Montserrat

Average temperature in September - Long Ground, Montserrat
  • Average high temperature in September: 28.9°C

The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is March (26.1°C).

  • Average low temperature in September: 27.8°C

The month with the highest average low temperature is September (27.8°C).
The coldest month (with the lowest average low temperature) is February (24.9°C).

Average pressure in September
Long Ground, Montserrat

Average pressure in September - Long Ground, Montserrat
  • Average pressure in September: 1013.1mbar

The months with the highest atmospheric pressure are January and June (1016mbar).
The months with the lowest atmospheric pressure are October and November (1012.4mbar).

Average wind speed in September
Long Ground, Montserrat

Average wind speed in September - Long Ground, Montserrat
  • Average wind speed in September: 20.5km/h

The windiest month (with the highest average wind speed) is July (27km/h).
The calmest month (with the lowest average wind speed) is October (19.8km/h).

Average humidity in September
Long Ground, Montserrat

Average humidity in September - Long Ground, Montserrat
  • Average humidity in September: 76%

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

Average rainfall in September
Long Ground, Montserrat

Average rainfall in September - Long Ground, Montserrat
  • Average rainfall in September: 87mm

The wettest month (with the highest rainfall) is October (101mm).
The driest months (with the least rainfall) are February and March (27mm).

Average rainfall days in September
Long Ground, Montserrat

Average rainfall days in September - Long Ground, Montserrat
  • Average rainfall days in September: 23.2 days

The month with the highest number of rainy days is December (24.4 days).
The month with the least rainy days is March (18.7 days).

Average daylight in September /
Average sunshine in September
Long Ground, Montserrat

Average daylight in September / Average sunshine in September - Long Ground, Montserrat
  • Average daylight in September: 12h and 1min

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

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 42min).

Average sunshine days in September
Long Ground, Montserrat

Average sunshine days in September - Long Ground, Montserrat
  • Average sunshine days in September: 3.9 days

The month with the most sunshine days is March (5.9 days).
The month with the least sunshine days is July (1.8 days).

Average UV index in September
Long Ground, Montserrat

Average UV index in September - Long Ground, Montserrat
  • 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
Long Ground, Montserrat

Average cloud cover in September - Long Ground, Montserrat
  • Average cloud cover in September: 35

The months with the most cloud cover are June and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 31).

Average visibility in September
Long Ground, Montserrat

Average visibility in September - Long Ground, Montserrat
  • 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).

Long Ground, Montserrat

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