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September Weather in Saint Joseph, Dominica

Last updated: August 23, 2025

In September, the average temperature in Saint Joseph, Dominica hovers around 27°C (82°F), with daily extremes ranging from a comfortable 25°C (78°F) to a warm 29°C (84°F). Expect 118 mm (4.6 in) of precipitation spread over 17 days, contributing to an average humidity level of 80%. Embrace the tropical feel as you immerse yourself in this vibrant climate!

September Temperature in Saint Joseph

In September in Saint Joseph, the average temperature is 27°C (82°F), with maximums reaching up to 29°C (84°F) and minimums dropping to as low as 25°C (78°F). This pleasant and warm weather makes it an ideal time for traveling to enjoy outdoor activities and explore the local attractions.

September Weather in Saint Joseph: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint Joseph, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Joseph, September typically has an average temperature of 27°C (82°F), with highs reaching up to 29°C (84°F) and lows dropping to around 25°C (78°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777787980808181818079
Data source: Temperature data for Saint Joseph 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 Saint Joseph

In Saint Joseph in September, the total precipitation amount is 118 mm (4.6 in), which falls over the course of 17 days.

September Precipitation Trends in Saint Joseph

The chart displays monthly precipitation patterns in Saint Joseph, 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 Saint Joseph, September typically receives around 118 mm (4.6 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec353535333866911121181229956
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint Joseph

In Saint Joseph in September, humidity is 80%. With an average temperature of 27°C (82°F), this humidity feels like stepping into a thick blanket of warmth that hugs you relentlessly, making outdoor activities feel sluggish and exhausting.

September Average Humidity in Saint Joseph

This chart illustrates the average monthly humidity levels in Saint Joseph, 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 Saint Joseph 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 Saint Joseph

In Saint Joseph 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 Saint Joseph.

Maximum UV Index Levels in Saint Joseph for September

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

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

This table compares monthly weather conditions in Saint Joseph, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)35 mm (1.4 inches)78%very high
February Weather25°C (77°F)35 mm (1.4 inches)77%extreme
March Weather25°C (77°F)35 mm (1.4 inches)78%extreme
April Weather25°C (78°F)33 mm (1.3 inches)78%extreme
May Weather26°C (79°F)38 mm (1.5 inches)80%extreme
June Weather27°C (80°F)66 mm (2.6 inches)82%extreme
July Weather27°C (81°F)91 mm (3.6 inches)84%extreme
August Weather27°C (81°F)112 mm (4.4 inches)82%extreme
September Weather27°C (82°F)118 mm (4.6 inches)80%extreme
October Weather27°C (81°F)122 mm (4.8 inches)80%extreme
November Weather26°C (80°F)99 mm (3.9 inches)80%very high
December Weather26°C (79°F)56 mm (2.2 inches)79%very high

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