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September Weather in Plymouth, Montserrat

Last updated: August 28, 2025

In Plymouth, Montserrat, the average temperature in September typically hovers around 28°C (82°F). You'll experience pleasant warmth, with minimum temperatures dipping to 25°C (78°F) and highs reaching 29°C (85°F). However, be prepared for some rain, as the area receives an average precipitation of 147 mm (5.8 in) over approximately 19 days. With average humidity levels around 80%, the air feels wonderfully tropical!

September Temperature in Plymouth

In September in Plymouth, 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 Plymouth: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plymouth, 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).
JanFebMarAprMayJunJulAugSepOctNovDec777777787980818182818079
Data source: Temperature data for Plymouth 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 Plymouth

In Plymouth in September, the precipitation amount is 147 mm (5.8 in) spread over 19 days, indicating a relatively wet period for the region.

September Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, 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 Plymouth, September typically receives around 147 mm (5.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec37382736424171891471008754
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Plymouth

In Plymouth in September, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

September Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, 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 Plymouth is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%76%78%79%81%84%83%80%79%80%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Plymouth

In Plymouth 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 Plymouth.

Maximum UV Index Levels in Plymouth for September

The chart shows the monthly maximum UV Index (UVI) for Plymouth 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 Plymouth typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111313131214131312109
Data source: Plymouth 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 Plymouth Compares to Other Months

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

This table compares monthly weather conditions in Plymouth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)37 mm (1.5 inches)77%very high
February Weather25°C (77°F)38 mm (1.5 inches)76%extreme
March Weather25°C (77°F)27 mm (1.1 inches)76%extreme
April Weather25°C (78°F)36 mm (1.4 inches)78%extreme
May Weather26°C (79°F)42 mm (1.7 inches)79%extreme
June Weather27°C (81°F)41 mm (1.6 inches)81%extreme
July Weather27°C (81°F)71 mm (2.8 inches)84%extreme
August Weather27°C (82°F)89 mm (3.5 inches)83%extreme
September Weather28°C (82°F)147 mm (5.8 inches)80%extreme
October Weather27°C (81°F)100 mm (4.0 inches)79%extreme
November Weather27°C (80°F)87 mm (3.4 inches)80%very high
December Weather26°C (79°F)54 mm (2.1 inches)78%very high

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