nomadseason

September Weather in Lemont Furnace, United States

Last updated: June 24, 2025

The average temperature in Lemont Furnace, United States during September is a pleasant 20°C (68°F). However, you can expect temperatures to vary, with minimums dipping to 4°C (39°F) and maximums reaching a balmy 33°C (92°F). Moreover, be prepared for 116 mm (4.6 in) of precipitation spread over about 10 days, and enjoy an average humidity of 68% for a truly immersive weather experience.

September Temperature in Lemont Furnace

In September in Lemont Furnace, the average temperature is 20°C (68°F). Maximum temperatures can reach up to 33°C (92°F), while minimums can drop as low as 4°C (39°F). It's a great time for travelers to enjoy mild weather and plan outdoor activities.

September Weather in Lemont Furnace: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lemont Furnace, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lemont Furnace, 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 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec323642526370757368574337
Data source: Temperature data for Lemont Furnace 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 Lemont Furnace

In Lemont Furnace in September, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.

September Precipitation Trends in Lemont Furnace

The chart displays monthly precipitation patterns in Lemont Furnace, 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 Lemont Furnace, September typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec901311161291481641339711611788120
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Lemont Furnace

In Lemont Furnace 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 Lemont Furnace

This chart illustrates the average monthly humidity levels in Lemont Furnace, 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 Lemont Furnace is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lemont Furnace

In Lemont Furnace 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 Lemont Furnace.

Maximum UV Index Levels in Lemont Furnace for September

The chart shows the monthly maximum UV Index (UVI) for Lemont Furnace 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 Lemont Furnace typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108643
Data source: Lemont Furnace 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 Lemont Furnace Compares to Other Months

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

This table compares monthly weather conditions in Lemont Furnace, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)90 mm (3.5 inches)86%moderate
February Weather2°C (37°F)131 mm (5.2 inches)86%moderate
March Weather6°C (43°F)116 mm (4.6 inches)86%high
April Weather11°C (52°F)129 mm (5.1 inches)84%very high
May Weather17°C (63°F)148 mm (5.8 inches)78%very high
June Weather21°C (70°F)164 mm (6.5 inches)79%very high
July Weather24°C (75°F)133 mm (5.2 inches)70%very high
August Weather23°C (73°F)97 mm (3.8 inches)59%very high
September Weather20°C (68°F)116 mm (4.6 inches)68%very high
October Weather14°C (58°F)117 mm (4.6 inches)80%high
November Weather6°C (43°F)88 mm (3.4 inches)86%moderate
December Weather3°C (37°F)120 mm (4.7 inches)85%moderate

Compare Lemont Furnace's Climate with Cities Worldwide