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September Weather in Grenada, United States

Last updated: June 24, 2025

In September, the average temperature in Grenada, United States is a pleasant 25°C (78°F), with daytime highs reaching up to 38°C (101°F) and nighttime lows dipping to 12°C (54°F). Expect about 91 mm (3.6 in) of precipitation spread over 8 days, contributing to an average humidity of 74%. Perfect for enjoying outdoor activities with a hint of tropical charm!

September Temperature in Grenada

In September in Grenada, the average temperature is 25°C (78°F). Maximums can reach 38°C (101°F), while minimums can drop to as low as 12°C (54°F). This makes Grenada an ideal destination for travelers seeking warm weather and diverse outdoor activities during this time.

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

The chart illustrates September temperature patterns in Grenada, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grenada, September typically has an average temperature of 25°C (78°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec465058637379828177675350
Data source: Temperature data for Grenada 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 Grenada

In Grenada in September, the total precipitation amount is 91 mm (3.6 in) over the course of 8 days.

September Precipitation Trends in Grenada

The chart displays monthly precipitation patterns in Grenada, 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 Grenada, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec120185164149109131961199112480134
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grenada

In Grenada in September humidity is 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

September Average Humidity in Grenada

This chart illustrates the average monthly humidity levels in Grenada, 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 Grenada is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grenada

In Grenada in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grenada.

Maximum UV Index Levels in Grenada for September

The chart shows the monthly maximum UV Index (UVI) for Grenada 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 Grenada typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Grenada 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 Grenada Compares to Other Months

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

This table compares monthly weather conditions in Grenada, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)119 mm (4.7 inches)85%moderate
February Weather10°C (50°F)185 mm (7.3 inches)84%high
March Weather15°C (58°F)164 mm (6.5 inches)82%very high
April Weather17°C (63°F)149 mm (5.9 inches)82%very high
May Weather23°C (73°F)109 mm (4.3 inches)82%extreme
June Weather26°C (79°F)131 mm (5.1 inches)79%extreme
July Weather28°C (82°F)96 mm (3.8 inches)82%extreme
August Weather27°C (81°F)119 mm (4.7 inches)77%extreme
September Weather25°C (78°F)91 mm (3.6 inches)74%very high
October Weather19°C (67°F)124 mm (4.9 inches)73%very high
November Weather12°C (53°F)80 mm (3.1 inches)85%high
December Weather10°C (50°F)133 mm (5.3 inches)88%moderate

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