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
The initiation of September sees an average high-temperature of a still warm 28.5°C (83.3°F), showing minor variations from the previous month. During the nights of September, Roseaux records an average low-temperature of 24.5°C (76.1°F), reflecting a modest decrease from daytime highs.Heat index
For September, the heat index is appraised at a hot 33°C (91.4°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.Know that the heat index computations account for shaded terrains and slight winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
In September, the average relative humidity in Roseaux is 80%.Rainfall
In September, the rain falls for 24.3 days. Throughout September, 111mm (4.37") of precipitation is accumulated. In Roseaux, during the entire year, the rain falls for 283.3 days and collects up to 1053mm (41.46") of precipitation.Daylight
In September, the average length of the day in Roseaux is 12h and 14min.On the first day of September, sunrise is at 06:41 and sunset at 19:10. On the last day of the month, sunrise is at 06:46 and sunset at 18:45 EDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
May through October, 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 threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a regular UV index of 7 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot is September in Roseaux?
What is the average humidity in September in Roseaux?
How many days does it rain in September in Roseaux?
What is the average length of the day in September in Roseaux?
When is the sunrise / sunset in September in Roseaux?
How many hours of sunshine does Roseaux have in September?
What are the months with the highest UV index in Roseaux?
What is the UV index reading in September in Roseaux?
Average temperature in September
Roseaux, Haiti
- Average high temperature in September: 28.5°C
The warmest months (with the highest average high temperature) are July and August (28.8°C).
The month with the lowest average high temperature is March (25.8°C).
- Average low temperature in September: 24.5°C
The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is March (21.8°C).
Average pressure in September
Roseaux, Haiti
- Average pressure in September: 1012.6mbar
The month with the highest atmospheric pressure is January (1015.8mbar).
The month with the lowest atmospheric pressure is October (1011.8mbar).
Average wind speed in September
Roseaux, Haiti
- Average wind speed in September: 7.4km/h
The windiest month (with the highest average wind speed) is March (12.1km/h).
The calmest month (with the lowest average wind speed) is September (7.4km/h).
Average humidity in September
Roseaux, Haiti
- Average humidity in September: 80%
The months with the highest relative humidity are October and November (81%).
The months with the lowest relative humidity are January, February, March, June, July, August and December (79%).
Average rainfall in September
Roseaux, Haiti
- Average rainfall in September: 111mm
The wettest month (with the highest rainfall) is May (154mm).
The driest month (with the least rainfall) is December (47mm).
Average rainfall days in September
Roseaux, Haiti
- Average rainfall days in September: 24.3 days
The months with the highest number of rainy days are May and October (27.5 days).
The month with the least rainy days is December (19 days).
Average daylight in September /
Average sunshine in September
Roseaux, 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 0min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).
Average sunshine days in September
Roseaux, Haiti
- Average sunshine days in September: 3.4 days
The month with the most sunshine days is January (5.8 days).
The month with the least sunshine days is May (1 days).
Average UV index in September
Roseaux, Haiti
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 6).
Average cloud cover in September
Roseaux, Haiti
- Average cloud cover in September: 25
The month with the most cloud cover is May (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Roseaux, 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).
Roseaux, Haiti
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