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September Weather in South Duxbury, United States

Last updated: June 24, 2025

In September, the average temperature in South Duxbury, United States is a pleasant 19°C (66°F). Expect a minimum of 10°C (50°F) and a maximum reaching up to 31°C (89°F). During this time, the region receives an average of 111 mm (4.4 in) of precipitation over 9 days, accompanied by a comfortable average humidity of 75%.

September Temperature in South Duxbury

In September in South Duxbury, the average temperature is 19°C (66°F). Maximum temperatures can reach 31°C (89°F), while the minimum can drop to as low as 10°C (50°F). Be prepared for a pleasant climate, making it ideal for outdoor activities and exploring the area.

September Weather in South Duxbury: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Duxbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Duxbury, September typically has an average temperature of 19°C (66°F), with highs reaching up to 31°C (89°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec333538475666727266574637
Data source: Temperature data for South Duxbury 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 South Duxbury

In South Duxbury in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 days.

September Precipitation Trends in South Duxbury

The chart displays monthly precipitation patterns in South Duxbury, 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 South Duxbury, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec891091141371059611075111168104128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in South Duxbury

In South Duxbury in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in South Duxbury

This chart illustrates the average monthly humidity levels in South Duxbury, 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 South Duxbury is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in South Duxbury

In South Duxbury in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in South Duxbury.

Maximum UV Index Levels in South Duxbury for September

The chart shows the monthly maximum UV Index (UVI) for South Duxbury 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 South Duxbury typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356899997642
Data source: South Duxbury 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 South Duxbury Compares to Other Months

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

This table compares monthly weather conditions in South Duxbury, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)89 mm (3.5 inches)84%moderate
February Weather2°C (35°F)109 mm (4.3 inches)84%moderate
March Weather3°C (39°F)114 mm (4.5 inches)82%high
April Weather8°C (47°F)137 mm (5.4 inches)79%very high
May Weather13°C (56°F)105 mm (4.1 inches)75%very high
June Weather19°C (66°F)95 mm (3.8 inches)78%very high
July Weather22°C (72°F)110 mm (4.3 inches)76%very high
August Weather22°C (72°F)75 mm (3.0 inches)76%very high
September Weather19°C (66°F)111 mm (4.4 inches)75%high
October Weather14°C (58°F)168 mm (6.6 inches)75%high
November Weather8°C (46°F)104 mm (4.1 inches)80%moderate
December Weather3°C (37°F)128 mm (5.0 inches)80%low

Compare South Duxbury's Climate with Cities Worldwide