Contents
- 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
Weather in September
Temperature
With average temperatures fluctuating between a high of 30.3°C (86.5°F) and a low of 27°C (80.6°F), September stands out as the warmest month.Heat index
September's average heat index is evaluated at a sweltering 37°C (98.6°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
The months with the lowest humidity in Marquis are January through March and September, with an average relative humidity of 73%.Rainfall
In Marquis, in September, it is raining for 20.3 days, with typically 63mm (2.48") of accumulated precipitation. Throughout the year, there are 255.2 rainfall days, and 560mm (22.05") of precipitation is accumulated.Daylight
In September, the average length of the day in Marquis is 12h and 12min.On the first day of September, sunrise is at 05:51 and sunset at 18:14. On the last day of the month, sunrise is at 05:53 and sunset at 17:53 AST.
Sunshine
In Marquis, Saint Lucia, the average sunshine in September is 9.6h.UV index
January through May, July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What part of the year is the hottest in Marquis?
How hot does it get in Marquis in September?
What is the least humid month in Marquis?
What is the average humidity in September in Marquis?
How many days does it rain in September in Marquis?
What is the average length of the day in September in Marquis?
What time are sunrise and sunset in September in Marquis?
How long on average sun shines in September in Marquis?
What are the months with the highest UV index in Marquis?
What is the UV index intensity in September in Marquis?
Average temperature in September
Marquis, Saint Lucia
- Average high temperature in September: 30.3°C
The warmest month (with the highest average high temperature) is September (30.3°C).
The months with the lowest average high temperature are January and February (27.5°C).
- Average low temperature in September: 27°C
The month with the highest average low temperature is October (27.2°C).
The coldest month (with the lowest average low temperature) is March (25°C).
Average pressure in September
Marquis, Saint Lucia
- Average pressure in September: 1012.6mbar
The month with the highest atmospheric pressure is June (1015mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).
Average wind speed in September
Marquis, Saint Lucia
- Average wind speed in September: 16.7km/h
The windiest month (with the highest average wind speed) is February (24.7km/h).
The calmest month (with the lowest average wind speed) is September (16.7km/h).
Average humidity in September
Marquis, Saint Lucia
- Average humidity in September: 73%
The months with the highest relative humidity are May, June, July, August and November (75%).
The months with the lowest relative humidity are January, February, March and September (73%).
Average rainfall in September
Marquis, Saint Lucia
- Average rainfall in September: 63mm
The wettest month (with the highest rainfall) is August (82mm).
The driest month (with the least rainfall) is February (19mm).
Average rainfall days in September
Marquis, Saint Lucia
- Average rainfall days in September: 20.3 days
The month with the highest number of rainy days is July (26.5 days).
The month with the least rainy days is February (16.4 days).
Average daylight in September /
Average sunshine in September
Marquis, Saint Lucia
- Average daylight in September: 12h and 1min
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 18min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is April (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Marquis, Saint Lucia
- Average sunshine days in September: 5.2 days
The month with the most sunshine days is January (7.8 days).
The month with the least sunshine days is July (0.8 days).
Average UV index in September
Marquis, Saint Lucia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is June (UV index 6).
Average cloud cover in September
Marquis, Saint Lucia
- Average cloud cover in September: 40
The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is February (Cloud cover 38).
Average visibility in September
Marquis, Saint Lucia
- 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).
Marquis, Saint Lucia
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