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December Weather in Lemont Furnace, United States

Last updated: June 24, 2025

In Lemont Furnace, United States, the average temperature in December hovers around 3°C (37°F). Expect a range where the minimum can dip to -15°C (4°F), while the maximum may reach up to 19°C (66°F). Prepare for about 120 mm (4.7 in) of precipitation over 14 days, contributing to an average humidity of 85%—perfect for those who love a cozy atmosphere!

December Temperature in Lemont Furnace

In December in Lemont Furnace, the average temperature is 3°C (37°F), with maximums reaching 19°C (66°F) and minimums plummeting to as low as -15°C (4°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates December 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, December typically has an average temperature of 3°C (37°F), with highs reaching up to 19°C (66°F) and lows dropping to around -15°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec323642526370757368574337
Data source: Temperature data for Lemont Furnace 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.

December Precipitation in Lemont Furnace

In Lemont Furnace in December, the precipitation amount is 120 mm (4.7 in) over the course of 14 days.

December Precipitation Trends in Lemont Furnace

The chart displays monthly precipitation patterns in Lemont Furnace, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lemont Furnace, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec901311161291481641339711611788120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lemont Furnace

In Lemont Furnace in December, humidity is 85%. With an average temperature of 3°C (37°F), this humidity feels like a chilling blanket enveloping you, making traveling uncomfortable as your clothes cling to your skin and the cold air bites at your face.

December Average Humidity in Lemont Furnace

This chart illustrates the average monthly humidity levels in Lemont Furnace, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lemont Furnace is approximately 85%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Lemont Furnace

In Lemont Furnace in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Lemont Furnace, you can check the information here.

Maximum UV Index Levels in Lemont Furnace for December

The chart shows the monthly maximum UV Index (UVI) for Lemont Furnace in December, 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 December, the maximum UV index in Lemont Furnace typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108643
Data source: Lemont Furnace December 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 December 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 December’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 December’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

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