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
Green Island, Jamaica, experiences a subtle adjustment in high-temperatures to a moderately hot 29.8°C (85.6°F) with the onset of September, maintaining near parity with August's 30°C (86°F). Green Island's nocturnal September readings average at 27.9°C (82.2°F), showing little variation from the daytime temperatures.Heat index
The heat index for September is estimated at a very hot 36°C (96.8°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Always consider that heat index estimations are for light winds and places in the shade. 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', combines both the air temperature and the humidity level to give a perceived human temperature. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
The average relative humidity in September in Green Island is 75%.Rainfall
In Green Island, in September, it is raining for 22.1 days, with typically 93mm (3.66") of accumulated precipitation. In Green Island, during the entire year, the rain falls for 236.8 days and collects up to 822mm (32.36") of precipitation.Daylight
The average length of the day in September in Green Island is 12h and 14min.On the first day of the month, sunrise is at 05:58 and sunset at 18:27. On the last day of September, in Green Island, sunrise is at 06:03 and sunset at 18:02 EST.
Sunshine
In Green Island, the average sunshine in September is 9.7h.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 in Green Island, Jamaica. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 7 during September, leads to the following recommendations:
Deflect overexposure. Sun protection is a necessity. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
How hot does it get in Green Island in September?
What is the average humidity in September in Green Island?
How much does it rain in Green Island in September?
How many hours of daylight does Green Island have in September?
When are sunrise and sunset in September in Green Island?
How many hours of sunshine does Green Island have in September?
What are the months with the highest UV index in Green Island?
When is the lowest UV index in Green Island?
How high is the UV index in September in Green Island?
Average temperature in September
Green Island, Jamaica
- Average high temperature in September: 29.8°C
The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is February (27.1°C).
- Average low temperature in September: 27.9°C
The month with the highest average low temperature is September (27.9°C).
The coldest months (with the lowest average low temperature) are February and March (24.8°C).
Average pressure in September
Green Island, Jamaica
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is January (1015.4mbar).
The month with the lowest atmospheric pressure is October (1011.3mbar).
Average wind speed in September
Green Island, Jamaica
- Average wind speed in September: 11.7km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is September (11.7km/h).
Average humidity in September
Green Island, Jamaica
- Average humidity in September: 75%
The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is March (73%).
Average rainfall in September
Green Island, Jamaica
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is October (112mm).
The driest months (with the least rainfall) are February and March (29mm).
Average rainfall days in September
Green Island, Jamaica
- Average rainfall days in September: 22.1 days
The month with the highest number of rainy days is May (24.3 days).
The month with the least rainy days is February (14.2 days).
Average daylight in September /
Average sunshine in September
Green Island, 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: 9h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in September
Green Island, Jamaica
- Average sunshine days in September: 4 days
The month with the most sunshine days is January (11.6 days).
The month with the least sunshine days is May (3.2 days).
Average UV index in September
Green Island, Jamaica
- 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
Green Island, Jamaica
- Average cloud cover in September: 20
The month with the most cloud cover is May (Cloud cover 26).
The month with the least cloud cover is December (Cloud cover 19).
Average visibility in September
Green Island, 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).
Green Island, Jamaica
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