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December Weather in Belleville, United States

Last updated: June 24, 2025

In Belleville, United States, the average temperature in December hovers around 1°C (35°F). The month can bring a range of temperatures, with a minimum of -17°C (1°F) and a maximum soaring up to 23°C (74°F). Expect about 37 mm (1.4 in) of precipitation over approximately 3 days, coupled with an average humidity of a relatively high 83%.

December Temperature in Belleville

In December in Belleville, the average temperature is 1°C (35°F). Maximums can reach 23°C (74°F), and minimums can be as low as -17°C (1°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates December temperature patterns in Belleville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belleville, December typically has an average temperature of 1°C (35°F), with highs reaching up to 23°C (74°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec293044536477807772544335
Data source: Temperature data for Belleville 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 Belleville

In Belleville in December, the precipitation amount is 37 mm (1.4 in) over a span of 3 days.

December Precipitation Trends in Belleville

The chart displays monthly precipitation patterns in Belleville, 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 Belleville, December typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec2523804917972799560892337
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Belleville

In Belleville in December humidity is 83%. With an average temperature of 1°C (35°F), this humidity feels like a damp chill enveloping you, making travel uncomfortable as you contend with the biting cold paired with the heavy moisture in the air.

December Average Humidity in Belleville

This chart illustrates the average monthly humidity levels in Belleville, 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 Belleville is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Belleville

In Belleville 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 Belleville, you can check the information here.

Maximum UV Index Levels in Belleville for December

The chart shows the monthly maximum UV Index (UVI) for Belleville 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 Belleville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Belleville 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 Belleville Compares to Other Months

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

This table compares monthly weather conditions in Belleville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)25 mm (1.0 inches)74%moderate
February Weather-1°C (30°F)23 mm (0.9 inches)78%moderate
March Weather7°C (44°F)80 mm (3.2 inches)67%high
April Weather11°C (53°F)49 mm (1.9 inches)70%very high
May Weather18°C (64°F)179 mm (7.0 inches)82%very high
June Weather25°C (78°F)72 mm (2.8 inches)81%extreme
July Weather27°C (81°F)79 mm (3.1 inches)80%extreme
August Weather25°C (77°F)95 mm (3.7 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)73%very high
October Weather12°C (55°F)88 mm (3.5 inches)71%high
November Weather6°C (43°F)23 mm (0.9 inches)79%moderate
December Weather1°C (35°F)37 mm (1.4 inches)83%moderate

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