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December Weather in Millcreek, United States

Last updated: June 24, 2025

In December, the average temperature in Millcreek, United States hovers around -4°C (26°F), with minimums plunging to -18°C (0°F) and highs reaching up to 11°C (53°F). Expect 63 mm (2.5 in) of precipitation spread over 11 days, contributing to a notably high humidity level of 88%.

December Temperature in Millcreek

In December in Millcreek, the average temperature is -4°C (26°F), with maximums reaching up to 11°C (53°F) and minimums dipping as low as -18°C (0°F). Travelers should prepare for cold weather and dress warmly to fully enjoy their stay.

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

The chart illustrates December temperature patterns in Millcreek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millcreek, December typically has an average temperature of -4°C (26°F), with highs reaching up to 11°C (53°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec262837425165747161453526
Data source: Temperature data for Millcreek 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 Millcreek

In Millcreek in December, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.

December Precipitation Trends in Millcreek

The chart displays monthly precipitation patterns in Millcreek, 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 Millcreek, December typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec727973746924192639514863
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Millcreek

In Millcreek in December humidity is 88%. With an average temperature of -4°C (26°F), this humidity feels like walking through a heavy fog that clings to your skin, making each breath feel cold and damp, which can be quite uncomfortable for traveling.

December Average Humidity in Millcreek

This chart illustrates the average monthly humidity levels in Millcreek, 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 Millcreek is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Millcreek

In Millcreek 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 Millcreek, you can check the information here.

Maximum UV Index Levels in Millcreek for December

The chart shows the monthly maximum UV Index (UVI) for Millcreek 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 Millcreek typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46811111212119653
Data source: Millcreek 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 Millcreek Compares to Other Months

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

This table compares monthly weather conditions in Millcreek, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)72 mm (2.8 inches)91%moderate
February Weather-2°C (29°F)79 mm (3.1 inches)92%high
March Weather3°C (37°F)72 mm (2.9 inches)84%very high
April Weather5°C (42°F)74 mm (2.9 inches)74%extreme
May Weather11°C (51°F)69 mm (2.7 inches)62%extreme
June Weather18°C (65°F)24 mm (0.9 inches)56%extreme
July Weather23°C (74°F)19 mm (0.8 inches)44%extreme
August Weather22°C (71°F)26 mm (1.0 inches)37%extreme
September Weather16°C (62°F)39 mm (1.5 inches)46%very high
October Weather7°C (45°F)51 mm (2.0 inches)67%high
November Weather2°C (36°F)48 mm (1.9 inches)84%moderate
December Weather-4°C (26°F)63 mm (2.5 inches)88%moderate

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