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 arrival of September is marked by an average high-temperature of a still hot 30.9°C (87.6°F), bearing a close resemblance to August. Jamaica's nights in September experience an average temperature drop to a warm 23.5°C (74.3°F).Heat index
September's average heat index is appraised at a blisteringly hot 40°C (104°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.The standards for the heat index are set for locations in shade and under light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. 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 extremely significant for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In September, the average relative humidity is 79%.Rainfall
The months with the most rainfall in Jamaica are May and September, with an average 95mm (3.74") of precipitation.Daylight
In September, the average length of the day is 12h and 15min.On the first day of September, sunrise is at 06:44 and sunset at 19:15. On the last day of the month, sunrise is at 06:51 and sunset at 18:49 CDT.
Sunshine
The average sunshine in September is 10.7h.UV index
April through October, with an average maximum UV index of 7, are months with the highest UV index in Jamaica. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 7 during September, leads to the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Jamaica in September?
What is the average humidity in September in Jamaica?
What is the rainiest month in Jamaica?
How many days does it rain in September in Jamaica?
What is the average length of the day in September in Jamaica?
When are sunrise and sunset in September in Jamaica?
How many hours of sunshine does Jamaica have in September?
What is the month with the highest UV index in Jamaica?
How high is the UV index in September in Jamaica?
Average temperature in September
Jamaica, Cuba
- Average high temperature in September: 30.9°C
The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is January (27.9°C).
- Average low temperature in September: 23.5°C
The month with the highest average low temperature is August (24.1°C).
The coldest month (with the lowest average low temperature) is February (20°C).
Average pressure in September
Jamaica, Cuba
- Average pressure in September: 1012.8mbar
The month with the highest atmospheric pressure is January (1016.5mbar).
The month with the lowest atmospheric pressure is October (1012mbar).
Average wind speed in September
Jamaica, Cuba
- Average wind speed in September: 7.4km/h
The windiest months (with the highest average wind speed) are February and December (9.8km/h).
The calmest months (with the lowest average wind speed) are September and October (7.4km/h).
Average humidity in September
Jamaica, Cuba
- Average humidity in September: 79%
The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is March (75%).
Average rainfall in September
Jamaica, Cuba
- Average rainfall in September: 95mm
The wettest months (with the highest rainfall) are May and September (95mm).
The driest month (with the least rainfall) is February (15mm).
Average rainfall days in September
Jamaica, Cuba
- Average rainfall days in September: 21.7 days
The month with the highest number of rainy days is October (23.9 days).
The month with the least rainy days is February (9 days).
Average daylight in September /
Average sunshine in September
Jamaica, Cuba
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).
Average sunshine days in September
Jamaica, Cuba
- Average sunshine days in September: 5.5 days
The month with the most sunshine days is December (14 days).
The month with the least sunshine days is May (4.6 days).
Average UV index in September
Jamaica, Cuba
- Average UV index in September: 7
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 6).
Average cloud cover in September
Jamaica, Cuba
- Average cloud cover in September: 23
The months with the most cloud cover are May and October (Cloud cover 28).
The months with the least cloud cover are February and August (Cloud cover 21).
Average visibility in September
Jamaica, Cuba
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, July, August, September, November and December (10km).
The months with the lowest visibility are May and October (9km).
