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December Weather in Lambertville, United States

Last updated: June 24, 2025

In December, the average temperature in Lambertville, United States hovers around 1°C (34°F). However, temperatures can vary significantly, with a minimum plunging to -25°C (-14°F) and a maximum reaching 16°C (62°F). Expect 54 mm (2.1 in) of precipitation spread over 9 days, and enjoy a high average humidity of 86%.

December Temperature in Lambertville

In December in Lambertville, the average temperature is 1°C (34°F). The maximum can reach 16°C (62°F) and the minimum can be as low as -25°C (-14°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Lambertville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lambertville, December typically has an average temperature of 1°C (34°F), with highs reaching up to 16°C (62°F) and lows dropping to around -25°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec282939486171767367564034
Data source: Temperature data for Lambertville 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 Lambertville

In Lambertville in December, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.

December Precipitation Trends in Lambertville

The chart displays monthly precipitation patterns in Lambertville, 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 Lambertville, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec67688189136971078459938254
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lambertville

In Lambertville in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Lambertville

This chart illustrates the average monthly humidity levels in Lambertville, 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 Lambertville 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 Lambertville

In Lambertville 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 Lambertville, you can visit Hourly UV Index in Lambertville.

Maximum UV Index Levels in Lambertville for December

The chart shows the monthly maximum UV Index (UVI) for Lambertville 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 Lambertville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Lambertville 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 Lambertville Compares to Other Months

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

This table compares monthly weather conditions in Lambertville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)67 mm (2.6 inches)88%moderate
February Weather-2°C (29°F)68 mm (2.7 inches)87%moderate
March Weather4°C (39°F)81 mm (3.2 inches)87%high
April Weather9°C (49°F)89 mm (3.5 inches)87%very high
May Weather16°C (61°F)136 mm (5.4 inches)81%very high
June Weather22°C (71°F)97 mm (3.8 inches)82%very high
July Weather24°C (76°F)107 mm (4.2 inches)81%very high
August Weather23°C (74°F)84 mm (3.3 inches)78%very high
September Weather20°C (68°F)59 mm (2.3 inches)78%very high
October Weather13°C (56°F)93 mm (3.7 inches)82%high
November Weather5°C (41°F)82 mm (3.2 inches)89%moderate
December Weather1°C (34°F)54 mm (2.1 inches)86%low

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