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December Weather in Lombard, United States

Last updated: June 24, 2025

In December, the average temperature in Lombard, United States is a crisp 0°C (33°F). Expect a minimum drop to -21°C (-5°F), while the maximum can reach a balmy 19°C (67°F). Throughout the month, anticipate about 53 mm (2.1 in) of precipitation spread over 7 days, alongside a high average humidity of 84%.

December Temperature in Lombard

In December in Lombard, the average temperature is 0°C (33°F). Maximum temperatures can reach 19°C (67°F), while minimums can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

December Weather in Lombard: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lombard, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lombard, December typically has an average temperature of 0°C (33°F), with highs reaching up to 19°C (67°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec262839475971757367543933
Data source: Temperature data for Lombard 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 Lombard

In Lombard in December, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.

December Precipitation Trends in Lombard

The chart displays monthly precipitation patterns in Lombard, 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 Lombard, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec61607911516413410592851275553
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lombard

In Lombard in December humidity is 84%. With average temperature 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less enjoyable and travel plans challenging.

December Average Humidity in Lombard

This chart illustrates the average monthly humidity levels in Lombard, 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 Lombard is approximately 84%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Lombard

In Lombard in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Lombard, you can visit Hourly UV Index in Lombard.

Maximum UV Index Levels in Lombard for December

The chart shows the monthly maximum UV Index (UVI) for Lombard 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 Lombard typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098632
Data source: Lombard 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 Lombard Compares to Other Months

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

This table compares monthly weather conditions in Lombard, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)61 mm (2.4 inches)82%moderate
February Weather-2°C (28°F)60 mm (2.4 inches)83%moderate
March Weather4°C (39°F)79 mm (3.1 inches)84%high
April Weather9°C (48°F)115 mm (4.5 inches)85%very high
May Weather15°C (60°F)164 mm (6.4 inches)79%very high
June Weather21°C (71°F)134 mm (5.3 inches)82%very high
July Weather24°C (75°F)105 mm (4.1 inches)80%very high
August Weather23°C (73°F)92 mm (3.6 inches)81%very high
September Weather20°C (68°F)85 mm (3.3 inches)80%very high
October Weather12°C (54°F)127 mm (5.0 inches)82%high
November Weather4°C (39°F)55 mm (2.2 inches)88%moderate
December Weather0°C (33°F)53 mm (2.1 inches)84%low

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