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September Weather in New Lenox, United States

Last updated: June 24, 2025

In September, the average temperature in New Lenox, United States is a pleasant 20°C (68°F), with a minimum of 3°C (39°F) and a maximum of 34°C (94°F). Expect 81 mm (3.2 in) of precipitation over 9 days, contributing to an average humidity of 80%. Enjoy the mild climate and the refreshing atmosphere!

September Temperature in New Lenox

In September in New Lenox, the average temperature is 20°C (68°F). Maximums can reach 34°C (94°F), while minimums can dip to as low as 3°C (39°F). This variation in temperature means travelers should prepare for both warm days and cool nights.

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

The chart illustrates September temperature patterns in New Lenox, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Lenox, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec262840496172767368553934
Data source: Temperature data for New Lenox 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 Lenox

In New Lenox in September, the precipitation amount is 81 mm (3.2 in) spread over a duration of 9 days.

September Precipitation Trends in New Lenox

The chart displays monthly precipitation patterns in New Lenox, 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 Lenox, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec65679312215914311486821386156
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Lenox

In New Lenox in September, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

September Average Humidity in New Lenox

This chart illustrates the average monthly humidity levels in New Lenox, 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 Lenox is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New Lenox

In New Lenox 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 Lenox.

Maximum UV Index Levels in New Lenox for September

The chart shows the monthly maximum UV Index (UVI) for New Lenox 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 Lenox typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: New Lenox 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 Lenox Compares to Other Months

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

This table compares monthly weather conditions in New Lenox, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)65 mm (2.6 inches)82%moderate
February Weather-2°C (29°F)67 mm (2.6 inches)83%moderate
March Weather4°C (40°F)93 mm (3.7 inches)84%high
April Weather9°C (49°F)122 mm (4.8 inches)85%very high
May Weather16°C (62°F)159 mm (6.3 inches)79%very high
June Weather22°C (72°F)143 mm (5.6 inches)82%very high
July Weather24°C (76°F)114 mm (4.5 inches)80%very high
August Weather23°C (74°F)86 mm (3.4 inches)81%very high
September Weather20°C (68°F)81 mm (3.2 inches)80%very high
October Weather13°C (55°F)138 mm (5.4 inches)82%high
November Weather4°C (40°F)61 mm (2.4 inches)88%moderate
December Weather1°C (34°F)56 mm (2.2 inches)84%low

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