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December Weather in Quincy, United States

Last updated: June 24, 2025

In December, the average temperature in Quincy, United States hovers around 2°C (35°F). Expect a chill, with minimums plunging to -18°C (-1°F), while the highs can reach up to 18°C (64°F). During this time, precipitation typically accumulates to 82 mm (3.2 in) over 10 days, keeping the atmosphere adequately moist with an average humidity of 86%.

December Temperature in Quincy

In December in Quincy, the average temperature is 2°C (35°F). Maximums can reach 18°C (64°F), while minimums can drop as low as -18°C (-1°F). Be prepared for a range of temperatures, and pack accordingly to ensure a comfortable travel experience.

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

The chart illustrates December temperature patterns in Quincy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Quincy, December typically has an average temperature of 2°C (35°F), with highs reaching up to 18°C (64°F) and lows dropping to around -18°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec303241516371757368574135
Data source: Temperature data for Quincy 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 Quincy

In Quincy in December, the total precipitation amount is 82 mm (3.2 in) observed over a span of 10 days.

December Precipitation Trends in Quincy

The chart displays monthly precipitation patterns in Quincy, 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 Quincy, December typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec739910210512211910492771009382
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Quincy

In Quincy in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in Quincy

This chart illustrates the average monthly humidity levels in Quincy, 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 Quincy is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Quincy

In Quincy 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 Quincy, you can check the information here.

Maximum UV Index Levels in Quincy for December

The chart shows the monthly maximum UV Index (UVI) for Quincy 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 Quincy typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Quincy 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 Quincy Compares to Other Months

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

This table compares monthly weather conditions in Quincy, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)73 mm (2.9 inches)88%moderate
February Weather0°C (33°F)99 mm (3.9 inches)87%moderate
March Weather5°C (42°F)102 mm (4.0 inches)87%high
April Weather10°C (51°F)104 mm (4.1 inches)87%very high
May Weather17°C (63°F)122 mm (4.8 inches)81%very high
June Weather22°C (72°F)119 mm (4.7 inches)82%very high
July Weather24°C (76°F)104 mm (4.1 inches)81%very high
August Weather23°C (73°F)92 mm (3.6 inches)78%very high
September Weather20°C (69°F)77 mm (3.0 inches)78%very high
October Weather14°C (57°F)100 mm (3.9 inches)82%high
November Weather5°C (41°F)93 mm (3.7 inches)89%moderate
December Weather2°C (35°F)82 mm (3.2 inches)86%moderate

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