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December Weather in Mercerville-Hamilton Square, United States

Last updated: June 24, 2025

In December, the average temperature in Mercerville-Hamilton Square, United States hovers around 4°C (39°F), with a minimum dipping as low as -12°C (11°F) and a maximum reaching up to 19°C (67°F). Expect 104 mm (4.1 in) of precipitation over about 10 days, contributing to an average humidity level of 80%.

December Temperature in Mercerville-Hamilton Square

In December in Mercerville-Hamilton Square, 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 Mercerville-Hamilton Square: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Mercerville-Hamilton Square, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercerville-Hamilton Square, 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).
JanFebMarAprMayJunJulAugSepOctNovDec353843546372787670614639
Data source: Temperature data for Mercerville-Hamilton Square 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 Mercerville-Hamilton Square

In Mercerville-Hamilton Square in December, the precipitation amount is 104 mm (4.1 in) over a period of 10 days.

December Precipitation Trends in Mercerville-Hamilton Square

The chart displays monthly precipitation patterns in Mercerville-Hamilton Square, 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 Mercerville-Hamilton Square, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec641091091061311001391358712183104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mercerville-Hamilton Square

In Mercerville-Hamilton Square 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 Mercerville-Hamilton Square

This chart illustrates the average monthly humidity levels in Mercerville-Hamilton Square, 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 Mercerville-Hamilton Square 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 Mercerville-Hamilton Square

In Mercerville-Hamilton Square 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 Mercerville-Hamilton Square, you can visit Hourly UV Index in Mercerville-Hamilton Square.

Maximum UV Index Levels in Mercerville-Hamilton Square for December

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

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

This table compares monthly weather conditions in Mercerville-Hamilton Square, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)64 mm (2.5 inches)84%moderate
February Weather3°C (38°F)109 mm (4.3 inches)82%moderate
March Weather6°C (43°F)109 mm (4.3 inches)81%high
April Weather12°C (54°F)106 mm (4.2 inches)78%very high
May Weather17°C (63°F)131 mm (5.1 inches)69%very high
June Weather22°C (73°F)100 mm (3.9 inches)69%very high
July Weather26°C (78°F)139 mm (5.5 inches)62%very high
August Weather24°C (76°F)135 mm (5.3 inches)65%very high
September Weather21°C (70°F)87 mm (3.4 inches)68%very high
October Weather16°C (61°F)121 mm (4.8 inches)74%high
November Weather8°C (46°F)83 mm (3.3 inches)82%moderate
December Weather4°C (39°F)104 mm (4.1 inches)80%low

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