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
La Vallée-de-Jacmel's September average high-temperature settles at a still moderately hot 29.3°C (84.7°F), showing a near match with the preceding month. La Vallée-de-Jacmel's nights throughout September are marked by an average low temperature of 25.3°C (77.5°F), a minor drop from the day's high.Heat index
The average heat index in September is evaluated at a fiery hot 35°C (95°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
In September, the average relative humidity in La Vallée-de-Jacmel, Haiti, is 76%.Rainfall
In September, in La Vallée-de-Jacmel, the rain falls for 19.3 days. Throughout September, 71mm (2.8") of precipitation is accumulated. In La Vallée-de-Jacmel, Haiti, during the entire year, the rain falls for 196.7 days and collects up to 531mm (20.91") of precipitation.Daylight
In September, the average length of the day is 12h and 14min.On the first day of September in La Vallée-de-Jacmel, sunrise is at 06:36 and sunset at 19:04. On the last day of the month, sunrise is at 06:41 and sunset at 18:39 EDT.
Sunshine
In September, the average sunshine is 9.9h.UV index
The months with the highest UV index are January, March through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 7 during September leads to these instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
How hot is it in La Vallée-de-Jacmel in September?
What is the average humidity in September in La Vallée-de-Jacmel?
How many days does it rain in September in La Vallée-de-Jacmel?
How many hours of daylight does La Vallée-de-Jacmel have in September?
When are sunrise and sunset in September in La Vallée-de-Jacmel?
How many hours of sunshine does La Vallée-de-Jacmel have in September?
When is the highest UV index in La Vallée-de-Jacmel?
What is the UV index intensity in September in La Vallée-de-Jacmel?
Average temperature in September
La Vallée-de-Jacmel, Haiti
- Average high temperature in September: 29.3°C
The warmest month (with the highest average high temperature) is August (29.7°C).
The months with the lowest average high temperature are January, February and March (27.2°C).
- Average low temperature in September: 25.3°C
The month with the highest average low temperature is September (25.3°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).
Average pressure in September
La Vallée-de-Jacmel, Haiti
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is January (1016mbar).
The month with the lowest atmospheric pressure is October (1012.2mbar).
Average wind speed in September
La Vallée-de-Jacmel, Haiti
- Average wind speed in September: 10.2km/h
The windiest month (with the highest average wind speed) is June (15.3km/h).
The calmest month (with the lowest average wind speed) is November (8.8km/h).
Average humidity in September
La Vallée-de-Jacmel, Haiti
- Average humidity in September: 76%
The month with the highest relative humidity is October (77%).
The month with the lowest relative humidity is February (72%).
Average rainfall in September
La Vallée-de-Jacmel, Haiti
- Average rainfall in September: 71mm
The wettest month (with the highest rainfall) is October (75mm).
The driest month (with the least rainfall) is January (10mm).
Average rainfall days in September
La Vallée-de-Jacmel, Haiti
- Average rainfall days in September: 19.3 days
The month with the highest number of rainy days is October (20.7 days).
The month with the least rainy days is January (9.3 days).
Average daylight in September /
Average sunshine in September
La Vallée-de-Jacmel, Haiti
- 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 6min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are May, June, July and August (Average sunshine: 11h and 24min).
The month with the least sunshine is February (Average sunshine: 7h and 24min).
Average sunshine days in September
La Vallée-de-Jacmel, Haiti
- Average sunshine days in September: 7.9 days
The month with the most sunshine days is December (18.7 days).
The month with the least sunshine days is April (6.7 days).
Average UV index in September
La Vallée-de-Jacmel, Haiti
- Average UV index in September: 7
The months with the highest UV index are January, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are February, November and December (UV index 6).
Average cloud cover in September
La Vallée-de-Jacmel, Haiti
- Average cloud cover in September: 21
The month with the most cloud cover is April (Cloud cover 30).
The month with the least cloud cover is December (Cloud cover 16).
Average visibility in September
La Vallée-de-Jacmel, Haiti
- 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).
La Vallée-de-Jacmel, Haiti
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