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
A minor adjustment in El Llano's average high-temperature is noted with the start of September, touching a still hot 30.3°C (86.5°F) from August's 30.5°C (86.9°F). El Llano records an average nighttime low of 23.2°C (73.8°F) in September.Heat index
In September, the heat index is calculated to be a torrid 39°C (102.2°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. 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.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
The months with the highest humidity are September through December, with an average relative humidity of 81%.Rainfall
In El Llano, in September, it is raining for 15.8 days, with typically 47mm (1.85") of accumulated precipitation. Throughout the year, there are 168.6 rainfall days, and 443mm (17.44") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 14min.On the first day of the month, sunrise is at 06:27 and sunset at 18:55. On the last day of September, sunrise is at 06:31 and sunset at 18:30 AST.
Sunshine
The months with the most sunshine are September and November, with an average of 9.4h of sunshine.UV index
May through July, September and October, 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 health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 7 during September leads to these instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in El Llano during September?
What are the most humid months?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
What are the months with the most sunshine?
How many hours of sunshine does El Llano have in September?
What is the month with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
El Llano, Dominican Republic
- Average high temperature in September: 30.3°C
The warmest month (with the highest average high temperature) is August (30.5°C).
The month with the lowest average high temperature is January (27.6°C).
- Average low temperature in September: 23.2°C
The month with the highest average low temperature is August (23.7°C).
The coldest month (with the lowest average low temperature) is February (20.2°C).
Average pressure in September
El Llano, Dominican Republic
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is January (1016.7mbar).
The month with the lowest atmospheric pressure is October (1012.6mbar).
Average wind speed in September
El Llano, Dominican Republic
- Average wind speed in September: 8.8km/h
The windiest month (with the highest average wind speed) is February (11.2km/h).
The calmest month (with the lowest average wind speed) is October (8.5km/h).
Average humidity in September
El Llano, Dominican Republic
- Average humidity in September: 81%
The months with the highest relative humidity are September, October, November and December (81%).
The month with the lowest relative humidity is March (77%).
Average rainfall in September
El Llano, Dominican Republic
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is August (86mm).
The driest month (with the least rainfall) is January (9mm).
Average rainfall days in September
El Llano, Dominican Republic
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (7.3 days).
Average daylight in September /
Average sunshine in September
El Llano, Dominican Republic
- 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 2min
The months with the most sunshine are September and November (Average sunshine: 9h and 24min).
The month with the least sunshine is May (Average sunshine: 8h and 42min).
Average sunshine days in September
El Llano, Dominican Republic
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is January (22.7 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
El Llano, Dominican Republic
- Average UV index in September: 7
The months with the highest UV index are May, June, July, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, August, November and December (UV index 6).
Average cloud cover in September
El Llano, Dominican Republic
- Average cloud cover in September: 25
The month with the most cloud cover is May (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in September
El Llano, Dominican Republic
- Average visibility in September: 9km
The months with the highest visibility are February, March, November and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September and October (9km).
