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September Weather in Brewster, United States

Last updated: June 24, 2025

In Brewster, United States, the average temperature in September hovers around 17°C (62°F). Expect a range from a cool 3°C (37°F) to a warm 35°C (96°F). During this period, precipitation typically totals about 20 mm (0.8 in) over 3 days, while the average humidity sits at a comfortable 60%.

September Temperature in Brewster

In September in Brewster, the average temperature is 17°C (62°F), with maximums reaching up to 35°C (96°F) and minimums dipping as low as 3°C (37°F). This variability in temperatures makes Brewster an ideal destination for travelers seeking both warmth and cooler respite during their adventures.

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

The chart illustrates September temperature patterns in Brewster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brewster, September typically has an average temperature of 17°C (62°F), with highs reaching up to 35°C (96°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec282939485967747362473729
Data source: Temperature data for Brewster 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 Brewster

In Brewster in September, the precipitation amount is 20 mm (0.8 in) accumulated over a period of 3 days.

September Precipitation Trends in Brewster

The chart displays monthly precipitation patterns in Brewster, 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 Brewster, September typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec745542332492421435466
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brewster

In Brewster in September humidity is 60%. With an average temperature of 17°C (62°F), this humidity feels like a refreshing embrace, making travel both comfortable and invigorating as you explore the sights without feeling overly sticky or uncomfortable.

September Average Humidity in Brewster

This chart illustrates the average monthly humidity levels in Brewster, 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 Brewster is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brewster

In Brewster 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 Brewster.

Maximum UV Index Levels in Brewster for September

The chart shows the monthly maximum UV Index (UVI) for Brewster 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 Brewster typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245689997532
Data source: Brewster 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 Brewster Compares to Other Months

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

This table compares monthly weather conditions in Brewster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)74 mm (2.9 inches)85%low
February Weather-2°C (29°F)55 mm (2.2 inches)86%moderate
March Weather4°C (39°F)42 mm (1.6 inches)86%moderate
April Weather9°C (48°F)33 mm (1.3 inches)82%high
May Weather15°C (59°F)24 mm (0.9 inches)77%very high
June Weather19°C (67°F)9 mm (0.3 inches)79%very high
July Weather23°C (74°F)2 mm (0.1 inches)77%very high
August Weather23°C (73°F)4 mm (0.2 inches)62%very high
September Weather17°C (62°F)20 mm (0.8 inches)60%high
October Weather8°C (48°F)42 mm (1.7 inches)80%moderate
November Weather3°C (37°F)54 mm (2.1 inches)87%moderate
December Weather-2°C (30°F)66 mm (2.6 inches)86%low

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