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September Weather in Rosalie, Dominica

Last updated: August 23, 2025

In September, the average temperature in Rosalie, Dominica hovers around 27°C (81°F), with a comfortable minimum of 25°C (77°F) and a maximum reaching 28°C (83°F). Expect significant precipitation, with about 139 mm (5.5 in) of rain spread across 20 days. Coupled with an average humidity of 80%, this makes for a warm and somewhat humid atmosphere. Stay prepared for the mix of sun and occasional rain!

September Temperature in Rosalie

In September in Rosalie, the average temperature is 27°C (81°F). Maximums can reach 28°C (83°F) and minimums can be as low as 25°C (77°F). This pleasant climate makes it an ideal time to explore the outdoors and enjoy various activities in Rosalie.

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

The chart illustrates September temperature patterns in Rosalie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosalie, September typically has an average temperature of 27°C (81°F), with highs reaching up to 28°C (83°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec767676777879798080807977
Data source: Temperature data for Rosalie 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 Rosalie

In Rosalie in September, the total precipitation amount is 139 mm (5.5 in) spread over 20 days.

September Precipitation Trends in Rosalie

The chart displays monthly precipitation patterns in Rosalie, 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 Rosalie, September typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec585758526010112815013916713586
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rosalie

In Rosalie 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 Rosalie

This chart illustrates the average monthly humidity levels in Rosalie, 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 Rosalie is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%77%78%78%80%82%84%82%80%80%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rosalie

In Rosalie 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 Rosalie.

Maximum UV Index Levels in Rosalie for September

The chart shows the monthly maximum UV Index (UVI) for Rosalie 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 Rosalie typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10111314141314131312109
Data source: Rosalie 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 Rosalie Compares to Other Months

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

This table compares monthly weather conditions in Rosalie, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)58 mm (2.3 inches)78%very high
February Weather24°C (76°F)57 mm (2.3 inches)77%extreme
March Weather24°C (76°F)58 mm (2.3 inches)78%extreme
April Weather25°C (77°F)51 mm (2.0 inches)78%extreme
May Weather26°C (78°F)60 mm (2.4 inches)80%extreme
June Weather26°C (79°F)101 mm (4.0 inches)82%extreme
July Weather26°C (79°F)128 mm (5.0 inches)84%extreme
August Weather26°C (80°F)150 mm (5.9 inches)82%extreme
September Weather27°C (81°F)139 mm (5.5 inches)80%extreme
October Weather26°C (80°F)167 mm (6.6 inches)80%extreme
November Weather26°C (79°F)135 mm (5.3 inches)80%very high
December Weather25°C (78°F)86 mm (3.4 inches)79%very high

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