September weather forecast
Guardalavaca, Cuba

September

Weather in September

In September, Guardalavaca experiences another rainfall peak reaching 56mm (2.2"), indicating the second phase of the rainy season. Despite the increase in rain, the temperature drops only slightly from the summer peak, maintaining the warmth throughout the month. The sea temperature remains at a cozy 29°C (84.2°F), thereby retaining beach activities as a favored pastime. Amidst the showers, the days are generally sunny and the nights pleasantly cool. September's weather offers a distinctive blend of warm, sunny, and rainy days that are uniquely charming.

Temperature

September's arrival brings an average high-temperature of a still tropical 30.5°C (86.9°F), slightly deviating from August's 31°C (87.8°F). September introduces a small decrease to a nighttime average of 26.2°C (79.2°F).

Heat index

September's heat index is computed to be a sweltering 38°C (100.4°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Guardalavaca, the average relative humidity in September is 77%.

Rainfall

In Guardalavaca, Cuba, in September, it is raining for 15.9 days, with typically 56mm (2.2") of accumulated precipitation. In Guardalavaca, during the entire year, the rain falls for 186.6 days and collects up to 480mm (18.9") of precipitation.

Sea temperature

July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Guardalavaca, Cuba.
Note: Water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

The average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 06:47 and sunset at 19:19. On the last day of September, sunrise is at 06:54 and sunset at 18:51 CDT.

Sunshine

In Guardalavaca, the average sunshine in September is 10.9h.

UV index

The months with the highest UV index are April through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take note! The UV strength of the Sun elevates when reflected off water and sand.

Frequently asked questions

Is it hot during September?
In September, the average high-temperature and low-temperature are 30.5°C (86.9°F) and 26.2°C (79.2°F) respectively. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is computed to be 38°C (100.4°F).
What is the average humidity in September?
In September, the average relative humidity is 77%.
How many days does it rain in September?
In Guardalavaca, during September, the rain falls for 15.9 days and regularly aggregates up to 56mm (2.2") of precipitation.
What are the months with the warmest sea water in Guardalavaca?
July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
What is the sea water temperature in September?
In Guardalavaca, in September, the average water temperature is 29°C (84.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.
How many hours of daylight does Guardalavaca have in September?
In Guardalavaca, Cuba, the average day length in September is 12h and 16min.
When is the sunrise / sunset in September?
In September, on the first day of the month, sunrise is at 06:47 and sunset at 19:19. On the last day of the month, sunrise is at 06:54 and sunset at 18:51 CDT.
How long on average sun shines in September?
In Guardalavaca, the average sunshine duration in September is 10.9h.
What are the months with the highest UV index?
The months with the highest UV index are April through November, with an average maximum UV index of 7.
What is the UV index intensity in September?
In September, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Guardalavaca, Cuba
Average temperature in September
Guardalavaca, Cuba
  • Average high temperature in September: 30.5°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (26.3°C).

  • Average low temperature in September: 26.2°C

The month with the highest average low temperature is August (26.6°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).

Average pressure in September - Guardalavaca, Cuba
Average pressure in September
Guardalavaca, Cuba
  • Average pressure in September: 1013.1mbar

The month with the highest atmospheric pressure is January (1017.2mbar).
The month with the lowest atmospheric pressure is October (1012.3mbar).

Average wind speed in September - Guardalavaca, Cuba
Average wind speed in September
Guardalavaca, Cuba
  • Average wind speed in September: 14.4km/h

The windiest month (with the highest average wind speed) is December (19km/h).
The calmest month (with the lowest average wind speed) is October (14.2km/h).

Average humidity in September - Guardalavaca, Cuba
Average humidity in September
Guardalavaca, Cuba
  • Average humidity in September: 77%

The months with the highest relative humidity are January, October, November and December (78%).
The month with the lowest relative humidity is March (74%).

Average rainfall in September - Guardalavaca, Cuba
Average rainfall in September
Guardalavaca, Cuba
  • Average rainfall in September: 56mm

The wettest month (with the highest rainfall) is October (74mm).
The driest month (with the least rainfall) is February (25mm).

Average rainfall days in September - Guardalavaca, Cuba
Average rainfall days in September
Guardalavaca, Cuba
  • Average rainfall days in September: 15.9 days

The month with the highest number of rainy days is October (20.7 days).
The month with the least rainy days is June (13.3 days).

Average sea temperature in September - Guardalavaca, Cuba
Average sea temperature in September
Guardalavaca, Cuba
  • Average sea temperature in September: 29°C

The best months for swimming (with the highest average sea temperature) are July, August, September and October (29°C).
The coldest months (with the lowest average sea temperature) are January, February and March (25°C).

Average daylight in September / Average sunshine in September - Guardalavaca, Cuba
Average daylight in September /
Average sunshine in September
Guardalavaca, Cuba
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in September: 10h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).

Average sunshine days in September - Guardalavaca, Cuba
Average sunshine days in September
Guardalavaca, Cuba
  • Average sunshine days in September: 12.1 days

The month with the most sunshine days is June (15 days).
The month with the least sunshine days is October (8.6 days).

Average UV index in September - Guardalavaca, Cuba
Average UV index in September
Guardalavaca, Cuba
  • Average UV index in September: 7

The months with the highest UV index are April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 6).

Average cloud cover in September - Guardalavaca, Cuba
Average cloud cover in September
Guardalavaca, Cuba
  • Average cloud cover in September: 26

The month with the most cloud cover is November (Cloud cover 41).
The months with the least cloud cover are July, August and September (Cloud cover 26).

Average visibility in September - Guardalavaca, Cuba
Average visibility in September
Guardalavaca, Cuba
  • 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).

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