nomadseason

September Weather in Mattapoisett, United States

Last updated: June 24, 2025

In Mattapoisett, United States, the average temperature for September hovers around 19°C (67°F), with a comfortable range from a minimum of 9°C (48°F) to a maximum of 30°C (87°F). You can expect about 102 mm (4.0 in) of precipitation spread over 10 days, complemented by an average humidity level of 75%.

September Temperature in Mattapoisett

In September in Mattapoisett, the average temperature is 19°C (67°F). Maximum temperatures can reach 30°C (87°F) while the minimum can drop as low as 9°C (48°F). This pleasant climate makes Mattapoisett an ideal destination for travelers seeking a comfortable and enjoyable experience.

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

The chart illustrates September temperature patterns in Mattapoisett, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mattapoisett, September typically has an average temperature of 19°C (67°F), with highs reaching up to 30°C (87°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec343539485767737367584637
Data source: Temperature data for Mattapoisett generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Mattapoisett

In Mattapoisett in September, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

September Precipitation Trends in Mattapoisett

The chart displays monthly precipitation patterns in Mattapoisett, 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 Mattapoisett, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec829710712298901028110214393116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Mattapoisett

In Mattapoisett in September humidity is 75%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sticky, as you navigate through the vibrant streets or scenic landscapes.

September Average Humidity in Mattapoisett

This chart illustrates the average monthly humidity levels in Mattapoisett, 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 Mattapoisett 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 Mattapoisett

In Mattapoisett in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Mattapoisett.

Maximum UV Index Levels in Mattapoisett for September

The chart shows the monthly maximum UV Index (UVI) for Mattapoisett 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 Mattapoisett typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: Mattapoisett 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 Mattapoisett Compares to Other Months

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

This table compares monthly weather conditions in Mattapoisett, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)82 mm (3.2 inches)84%moderate
February Weather2°C (36°F)97 mm (3.8 inches)84%moderate
March Weather4°C (39°F)107 mm (4.2 inches)82%high
April Weather9°C (48°F)122 mm (4.8 inches)79%very high
May Weather14°C (57°F)98 mm (3.9 inches)75%very high
June Weather19°C (67°F)90 mm (3.5 inches)78%very high
July Weather23°C (74°F)102 mm (4.0 inches)76%very high
August Weather23°C (74°F)81 mm (3.2 inches)76%very high
September Weather19°C (67°F)102 mm (4.0 inches)75%very high
October Weather14°C (58°F)143 mm (5.6 inches)75%high
November Weather8°C (46°F)93 mm (3.7 inches)80%moderate
December Weather3°C (38°F)116 mm (4.6 inches)80%low

Compare Mattapoisett's Climate with Cities Worldwide