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September Weather in Guantanamo, Cuba

Last updated: August 23, 2025

In September, the average temperature in Guantanamo, Cuba hovers around 27°C (81°F), with a comfortable minimum of 22°C (71°F) and a peak of 35°C (95°F). Expect a total precipitation of 136 mm (5.4 in) spread over 21 days, resulting in an average humidity of 80%, creating a warm and humid atmosphere throughout the month.

September Temperature in Guantanamo

In September in Guantanamo, the average temperature is 27°C (81°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 22°C (71°F). This climate makes Guantanamo an ideal destination for travelers seeking warm and pleasant weather.

September Weather in Guantanamo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Guantanamo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guantanamo, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec747676787981828281797776
Data source: Temperature data for Guantanamo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Guantanamo

In Guantanamo in September, the total precipitation amount is 136 mm (5.4 in), occurring over the course of 21 days.

September Precipitation Trends in Guantanamo

The chart displays monthly precipitation patterns in Guantanamo, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Guantanamo, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec211537552038896971361079436
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Guantanamo

In Guantanamo in September humidity is 80%. With an average temperature of 27°C (81°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making travel tiring as sweat beads form quickly and the air feels thick and heavy.

September Average Humidity in Guantanamo

This chart illustrates the average monthly humidity levels in Guantanamo, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Guantanamo is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%72%72%70%73%78%81%80%80%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Guantanamo

In Guantanamo in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Guantanamo.

Maximum UV Index Levels in Guantanamo for September

The chart shows the monthly maximum UV Index (UVI) for Guantanamo in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Guantanamo typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911121313131313131198
Data source: Guantanamo September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Guantanamo Compares to Other Months

Weather in Guantanamo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Guantanamo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Guantanamo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)21 mm (0.8 inches)76%very high
February Weather24°C (76°F)15 mm (0.6 inches)74%extreme
March Weather24°C (76°F)37 mm (1.4 inches)72%extreme
April Weather26°C (78°F)55 mm (2.2 inches)72%extreme
May Weather26°C (79°F)203 mm (8.0 inches)70%extreme
June Weather27°C (81°F)88 mm (3.4 inches)73%extreme
July Weather28°C (82°F)96 mm (3.8 inches)78%extreme
August Weather28°C (82°F)97 mm (3.8 inches)81%extreme
September Weather27°C (81°F)136 mm (5.4 inches)80%extreme
October Weather26°C (80°F)107 mm (4.2 inches)80%extreme
November Weather25°C (78°F)94 mm (3.7 inches)82%very high
December Weather24°C (76°F)36 mm (1.4 inches)80%very high

Compare Guantanamo's Climate with Cities Worldwide