September weather forecastCayo Largo, Cuba
September
Weather in September
The first month of the autumn, September, is still a hot month in Cayo Largo, Cuba, with an average temperature fluctuating between 23.5°C (74.3°F) and 31.6°C (88.9°F).Temperature
In September, Cayo Largo's weather conditions record an average high-temperature of a still hot 31.6°C (88.9°F), demonstrating little divergence from the preceding month. Cayo Largo in September anticipates an average nighttime temperature of 23.5°C (74.3°F).Heat index
For most parts of September, the heat index is evaluated at an extremely hot 43°C (109.4°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. 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. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
The average relative humidity in September is 81%.Rainfall
In September, in Cayo Largo, the rain falls for 19.1 days. Throughout September, 64mm (2.52") of precipitation is accumulated. Throughout the year, there are 143.3 rainfall days, and 542mm (21.34") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 16min.On the first day of September, sunrise is at 07:16 and sunset at 19:50. On the last day of the month, sunrise is at 07:25 and sunset at 19:22 CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 7 suggests this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cayo Largo, Cuba
- Average high temperature in September: 31.6°C
The warmest month (with the highest average high temperature) is August (32.6°C).
The month with the lowest average high temperature is January (25.5°C).
- Average low temperature in September: 23.5°C
The months with the highest average low temperature are July and August (23.9°C).
The coldest month (with the lowest average low temperature) is January (17.6°C).
Average pressure in September
Cayo Largo, Cuba
- Average pressure in September: 1013mbar
The month with the highest atmospheric pressure is January (1018.1mbar).
The month with the lowest atmospheric pressure is October (1012.9mbar).
Average wind speed in September
Cayo Largo, Cuba
- Average wind speed in September: 7.3km/h
The windiest month (with the highest average wind speed) is March (10km/h).
The calmest month (with the lowest average wind speed) is July (7.1km/h).
Average humidity in September
Cayo Largo, Cuba
- Average humidity in September: 81%
The months with the highest relative humidity are October and December (82%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Cayo Largo, Cuba
- Average rainfall in September: 64mm
The wettest month (with the highest rainfall) is August (98mm).
The driest month (with the least rainfall) is March (10mm).
Average rainfall days in September
Cayo Largo, Cuba
- Average rainfall days in September: 19.1 days
The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is March (5.3 days).
Average daylight in September /
Average sunshine in September
Cayo Largo, Cuba
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are May and June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Cayo Largo, Cuba
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is March (25.3 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in September
Cayo Largo, Cuba
- Average UV index in September: 7
The months with the highest UV index are April, May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in September
Cayo Largo, Cuba
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 39).
The months with the least cloud cover are April and July (Cloud cover 26).
Average visibility in September
Cayo Largo, Cuba
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July, August, September and November (9km).
The months with the lowest visibility are January, February, October and December (8km).
