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December Weather in Coplay, United States

Last updated: June 24, 2025

In December, the average temperature in Coplay, United States hovers around 2°C (36°F), with minimums dipping as low as -14°C (6°F) and maximums reaching up to 17°C (63°F). Prepare for a fair amount of precipitation, averaging 110 mm (4.3 in) over about 11 days, and brace yourself for the high humidity levels, typically around 85%.

December Temperature in Coplay

In December in Coplay, the average temperature is 2°C (36°F), with maximums reaching up to 17°C (63°F) and minimums dropping as low as -14°C (6°F). This makes it essential for travelers to prepare for a wide range of temperatures, ensuring they have appropriate clothing for both chilly and milder conditions.

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

The chart illustrates December temperature patterns in Coplay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coplay, December typically has an average temperature of 2°C (36°F), with highs reaching up to 17°C (63°F) and lows dropping to around -14°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec313440506170767367574236
Data source: Temperature data for Coplay 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 Coplay

In Coplay in December, the precipitation amount is 110 mm (4.3 in) spread over 11 days.

December Precipitation Trends in Coplay

The chart displays monthly precipitation patterns in Coplay, 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 Coplay, December typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7510910011514110613614211112295110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Coplay

In Coplay in December, humidity is 85%. With an average temperature of 2°C (36°F), this humidity feels like an icy blanket clinging to your skin, making travel challenging as the cold dampness seeps into your bones and fogs your breath.

December Average Humidity in Coplay

This chart illustrates the average monthly humidity levels in Coplay, 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 Coplay is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Coplay

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

Maximum UV Index Levels in Coplay for December

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

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

This table compares monthly weather conditions in Coplay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)75 mm (2.9 inches)87%moderate
February Weather1°C (34°F)109 mm (4.3 inches)85%moderate
March Weather4°C (40°F)99 mm (3.9 inches)85%high
April Weather10°C (51°F)115 mm (4.5 inches)83%very high
May Weather16°C (61°F)141 mm (5.5 inches)75%very high
June Weather21°C (70°F)106 mm (4.2 inches)73%very high
July Weather24°C (76°F)136 mm (5.3 inches)65%very high
August Weather23°C (74°F)142 mm (5.6 inches)62%very high
September Weather20°C (68°F)111 mm (4.4 inches)66%very high
October Weather14°C (57°F)122 mm (4.8 inches)79%high
November Weather6°C (43°F)95 mm (3.7 inches)87%moderate
December Weather2°C (36°F)110 mm (4.3 inches)85%low

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