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
September
Weather in September
Temperature
The weather during September records an average high-temperature of a still moderately hot 29.5°C (85.1°F), closely mirroring the preceding month. A minimal decline in temperature from daytime highs is anticipated throughout the September nights, averaging a still warm 26.7°C (80.1°F).Heat index
In September, the average heat index is calculated to be a torrid 35°C (95°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
The average relative humidity in September in Duncans is 76%.Rainfall
In Duncans, during September, the rain falls for 18.4 days and regularly aggregates up to 88mm (3.46") of precipitation. In Duncans, Jamaica, during the entire year, the rain falls for 177.2 days and collects up to 687mm (27.05") of precipitation.Daylight
The average length of the day in September is 12h and 14min.On the first day of the month, sunrise is at 05:55 and sunset at 18:24. On the last day of September, in Duncans, sunrise is at 06:00 and sunset at 17:59 EST.
Sunshine
In September, the average sunshine in Duncans, Jamaica, is 10.3h.UV index
January, March through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 7 turns into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Duncans during September?
What is the average humidity in September in Duncans?
How much does it rain in Duncans in September?
What is the average length of the day in September in Duncans?
When is the sunrise / sunset in September in Duncans?
How many hours of sunshine does Duncans have in September?
What is the month with the highest UV index in Duncans?
What is the UV index intensity in September in Duncans?
Average temperature in September
Duncans, Jamaica
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is August (29.7°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in September: 26.7°C
The months with the highest average low temperature are July and August (26.8°C).
The coldest month (with the lowest average low temperature) is February (23.8°C).
Average pressure in September
Duncans, Jamaica
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is January (1015.6mbar).
The month with the lowest atmospheric pressure is October (1011.4mbar).
Average wind speed in September
Duncans, Jamaica
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is December (20km/h).
The calmest month (with the lowest average wind speed) is September (13km/h).
Average humidity in September
Duncans, Jamaica
- Average humidity in September: 76%
The month with the highest relative humidity is June (78%).
The month with the lowest relative humidity is March (75%).
Average rainfall in September
Duncans, Jamaica
- Average rainfall in September: 88mm
The wettest month (with the highest rainfall) is May (90mm).
The driest month (with the least rainfall) is February (19mm).
Average rainfall days in September
Duncans, Jamaica
- Average rainfall days in September: 18.4 days
The month with the highest number of rainy days is September (18.4 days).
The month with the least rainy days is February (10.6 days).
Average daylight in September /
Average sunshine in September
Duncans, Jamaica
- 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: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 36min).
Average sunshine days in September
Duncans, Jamaica
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is December (18 days).
The month with the least sunshine days is September (9.8 days).
Average UV index in September
Duncans, Jamaica
- Average UV index in September: 7
The months with the highest UV index are January, March, April, May, June, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is February (UV index 6).
Average cloud cover in September
Duncans, Jamaica
- Average cloud cover in September: 22
The months with the most cloud cover are January, May and November (Cloud cover 28).
The month with the least cloud cover is July (Cloud cover 21).
Average visibility in September
Duncans, Jamaica
- 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).
