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December Weather in Triadelphia, United States

Last updated: June 24, 2025

In December, the average temperature in Triadelphia, United States hovers around 3°C (37°F). Expect chilly days, with minimums plunging to -16°C (4°F) and maximums reaching a mild 18°C (65°F). You'll also encounter 112 mm (4.4 in) of precipitation spread across 12 days, bringing the average humidity to a high 86%. Be sure to pack accordingly!

December Temperature in Triadelphia

In December in Triadelphia, the average temperature is 3°C (37°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -16°C (4°F). Travelers should be prepared for a wide temperature range, bringing layered clothing to stay comfortable throughout their visit.

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

The chart illustrates December temperature patterns in Triadelphia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Triadelphia, December typically has an average temperature of 3°C (37°F), with highs reaching up to 18°C (65°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec323643526370757368584337
Data source: Temperature data for Triadelphia 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 Triadelphia

In Triadelphia in December, the total precipitation amount is 112 mm (4.4 in), falling over the course of 12 days.

December Precipitation Trends in Triadelphia

The chart displays monthly precipitation patterns in Triadelphia, 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 Triadelphia, December typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec921171161391381571238911311889112
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Triadelphia

In Triadelphia in December humidity is 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Triadelphia

This chart illustrates the average monthly humidity levels in Triadelphia, 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 Triadelphia is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Triadelphia

In Triadelphia 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 Triadelphia, you can check the information here.

Maximum UV Index Levels in Triadelphia for December

The chart shows the monthly maximum UV Index (UVI) for Triadelphia 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 Triadelphia typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Triadelphia 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 Triadelphia Compares to Other Months

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

This table compares monthly weather conditions in Triadelphia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)92 mm (3.6 inches)88%moderate
February Weather2°C (36°F)117 mm (4.6 inches)88%moderate
March Weather6°C (43°F)116 mm (4.6 inches)88%high
April Weather11°C (52°F)139 mm (5.5 inches)86%very high
May Weather17°C (63°F)138 mm (5.4 inches)82%very high
June Weather21°C (71°F)156 mm (6.2 inches)84%very high
July Weather24°C (75°F)123 mm (4.9 inches)82%very high
August Weather23°C (73°F)89 mm (3.5 inches)73%very high
September Weather20°C (69°F)113 mm (4.4 inches)73%very high
October Weather14°C (58°F)118 mm (4.7 inches)81%high
November Weather6°C (43°F)89 mm (3.5 inches)89%moderate
December Weather3°C (37°F)112 mm (4.4 inches)86%moderate

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