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December Weather in Cranbury, United States

Last updated: June 24, 2025

In December, the average temperature in Cranbury, United States hovers around 4°C (39°F). You'll want to prepare for a temperature range that can swing from a chilly -12°C (11°F) to a mild 19°C (67°F). With an average precipitation of 102 mm (4.0 in) over 9 days, you might encounter some wet weather. Don't forget, the average humidity sits at a comfortable 80%!

December Temperature in Cranbury

In December in Cranbury, the average temperature is 4°C (39°F), with maximums reaching 19°C (67°F) and minimums plummeting to as low as -12°C (11°F). It's essential to pack layers and prepare for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Cranbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cranbury, December typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (67°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec353843546373787670614639
Data source: Temperature data for Cranbury 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 Cranbury

In Cranbury in December, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

December Precipitation Trends in Cranbury

The chart displays monthly precipitation patterns in Cranbury, 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 Cranbury, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec63109107107127971381318813283102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cranbury

In Cranbury in December, humidity is 80%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm while navigating through the misty streets.

December Average Humidity in Cranbury

This chart illustrates the average monthly humidity levels in Cranbury, 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 Cranbury is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cranbury

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

Maximum UV Index Levels in Cranbury for December

The chart shows the monthly maximum UV Index (UVI) for Cranbury 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 Cranbury typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Cranbury 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 Cranbury Compares to Other Months

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

This table compares monthly weather conditions in Cranbury, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)63 mm (2.5 inches)84%moderate
February Weather3°C (39°F)109 mm (4.3 inches)82%moderate
March Weather6°C (44°F)107 mm (4.2 inches)81%high
April Weather12°C (54°F)107 mm (4.2 inches)78%very high
May Weather17°C (63°F)127 mm (5.0 inches)69%very high
June Weather23°C (73°F)97 mm (3.8 inches)69%very high
July Weather26°C (79°F)138 mm (5.4 inches)62%very high
August Weather25°C (76°F)131 mm (5.2 inches)65%very high
September Weather21°C (71°F)88 mm (3.5 inches)68%very high
October Weather16°C (61°F)132 mm (5.2 inches)74%high
November Weather8°C (47°F)83 mm (3.3 inches)82%moderate
December Weather4°C (39°F)102 mm (4.0 inches)80%low

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