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September Weather in New Windsor, United States

Last updated: June 24, 2025

In September, the average temperature in New Windsor, United States is a comfortable 21°C (70°F), with lows dipping to 5°C (42°F) and highs reaching up to 34°C (93°F). Expect 116 mm (4.5 in) of precipitation spread over 10 days, while the ambience remains humid, with an average humidity of 75%.

September Temperature in New Windsor

In September in New Windsor, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 5°C (42°F). This range makes New Windsor a perfect destination for travelers seeking both warm days and cooler evenings.

September Weather in New Windsor: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New Windsor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Windsor, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec353944546473787570604539
Data source: Temperature data for New Windsor 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 New Windsor

In New Windsor in September, the precipitation amount is 116 mm (4.5 in) over the course of 10 days.

September Precipitation Trends in New Windsor

The chart displays monthly precipitation patterns in New Windsor, 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 New Windsor, September typically receives around 116 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec629593951441251521561161039096
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Windsor

In New Windsor in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in New Windsor

This chart illustrates the average monthly humidity levels in New Windsor, 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 New Windsor is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New Windsor

In New Windsor 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 New Windsor.

Maximum UV Index Levels in New Windsor for September

The chart shows the monthly maximum UV Index (UVI) for New Windsor 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 New Windsor typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: New Windsor 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 New Windsor Compares to Other Months

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

This table compares monthly weather conditions in New Windsor, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)62 mm (2.4 inches)84%moderate
February Weather4°C (39°F)95 mm (3.8 inches)83%moderate
March Weather7°C (44°F)93 mm (3.6 inches)83%high
April Weather12°C (55°F)95 mm (3.7 inches)81%very high
May Weather18°C (64°F)144 mm (5.7 inches)78%very high
June Weather23°C (73°F)125 mm (4.9 inches)79%very high
July Weather26°C (78°F)152 mm (6.0 inches)74%very high
August Weather24°C (76°F)156 mm (6.1 inches)72%very high
September Weather21°C (70°F)116 mm (4.5 inches)75%very high
October Weather15°C (60°F)103 mm (4.1 inches)81%high
November Weather7°C (45°F)90 mm (3.6 inches)85%moderate
December Weather4°C (39°F)96 mm (3.8 inches)84%moderate

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