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September Weather in Ridgefield, United States

Last updated: June 24, 2025

In Ridgefield, United States, the average temperature in September hovers around 20°C (68°F), creating a comfortable atmosphere for outdoor activities. However, temperatures can fluctuate, with a minimum of 6°C (44°F) and a maximum hitting 33°C (92°F). During this period, expect about 106 mm (4.2 in) of precipitation spread over 10 days, contributing to an average humidity of 68%. Whether you’re planning a visit or simply curious, this climate offers a unique blend of warmth and refreshing rain!

September Temperature in Ridgefield

In September in Ridgefield, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 6°C (44°F). Be prepared for a pleasant mix of warm days and cooler evenings, making it an ideal time for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Ridgefield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ridgefield, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec323440506070767468584536
Data source: Temperature data for Ridgefield 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 Ridgefield

In Ridgefield in September, the precipitation amount is 106 mm (4.2 in) over a span of 10 days.

September Precipitation Trends in Ridgefield

The chart displays monthly precipitation patterns in Ridgefield, 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 Ridgefield, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec69102921201129412911010614092114
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ridgefield

In Ridgefield in September humidity is 68%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls while also prompting travelers to stay hydrated and seek out refreshing breaks from the heat.

September Average Humidity in Ridgefield

This chart illustrates the average monthly humidity levels in Ridgefield, 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 Ridgefield is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ridgefield

In Ridgefield 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 Ridgefield.

Maximum UV Index Levels in Ridgefield for September

The chart shows the monthly maximum UV Index (UVI) for Ridgefield 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 Ridgefield typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Ridgefield 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 Ridgefield Compares to Other Months

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

This table compares monthly weather conditions in Ridgefield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)69 mm (2.7 inches)84%moderate
February Weather1°C (35°F)102 mm (4.0 inches)82%moderate
March Weather4°C (40°F)92 mm (3.6 inches)81%high
April Weather10°C (50°F)120 mm (4.7 inches)78%very high
May Weather15°C (60°F)112 mm (4.4 inches)69%very high
June Weather21°C (70°F)94 mm (3.7 inches)69%very high
July Weather24°C (76°F)129 mm (5.1 inches)62%very high
August Weather23°C (75°F)110 mm (4.3 inches)65%very high
September Weather20°C (68°F)106 mm (4.2 inches)68%very high
October Weather14°C (58°F)139 mm (5.5 inches)74%high
November Weather7°C (45°F)92 mm (3.6 inches)82%moderate
December Weather2°C (37°F)114 mm (4.5 inches)80%low

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