September Weather in Grenville, Grenada

Last updated: August 23, 2025

In September, the average temperature in Grenville, Grenada is a warm 28°C (82°F), with a pleasant range from a minimum of 25°C (78°F) to a maximum of 29°C (85°F). Expect some rain, as 146 mm (5.7 in) of precipitation typically falls over 21 days, contributing to an average humidity of 79%. Enjoy the tropical vibes!

September Temperature in Grenville

In September in Grenville, the average temperature is 28°C (82°F), with maximums reaching 29°C (85°F) and minimums dropping to as low as 25°C (78°F). This mild climate makes it an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Grenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grenville, September typically has an average temperature of 28°C (82°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (78°F).

Data source: Temperature data for Grenville generated using information from the Copernicus Climate Change Service.

September Precipitation in Grenville

In Grenville in September, the total precipitation amount is 146 mm (5.7 in) spread over 21 days.

September Precipitation Trends in Grenville

The chart displays monthly precipitation patterns in Grenville, 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 Grenville, September typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 21 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Grenville

In Grenville in September humidity is 79%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration more strenuous and requiring frequent breaks for hydration.

September Average Humidity in Grenville

This chart illustrates the average monthly humidity levels in Grenville, 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 Grenville is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grenville

In Grenville in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Grenville, you can check here.

Maximum UV Index Levels in Grenville for September

The chart shows the monthly maximum UV Index (UVI) for Grenville 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 Grenville typically reaches 14, which falls under the extreme exposure category.

Data source: Grenville 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 Grenville Compares to Other Months

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

This table compares monthly weather conditions in Grenville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	49 mm (1.9 inches)	78%	extreme
February Weather	26°C (78°F)	37 mm (1.5 inches)	77%	extreme
March Weather	26°C (79°F)	41 mm (1.6 inches)	76%	extreme
April Weather	26°C (80°F)	26 mm (1.0 inches)	75%	extreme
May Weather	27°C (81°F)	52 mm (2.1 inches)	76%	extreme
June Weather	27°C (81°F)	112 mm (4.4 inches)	80%	extreme
July Weather	27°C (81°F)	162 mm (6.4 inches)	83%	extreme
August Weather	27°C (81°F)	174 mm (6.8 inches)	80%	extreme
September Weather	28°C (82°F)	146 mm (5.7 inches)	79%	extreme
October Weather	27°C (82°F)	197 mm (7.8 inches)	79%	extreme
November Weather	27°C (81°F)	134 mm (5.3 inches)	81%	extreme
December Weather	26°C (80°F)	82 mm (3.2 inches)	80%	very high