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December Weather in Germantown, United States

Last updated: June 24, 2025

In Germantown, United States, the average temperature in December hovers around 8°C (47°F). Visitors should be prepared for a broad temperature range, with minimums dipping as low as -10°C (15°F) and maximums soaring up to 25°C (77°F). Expect about 148 mm (5.8 in) of precipitation spread over 10 days, contributing to an average humidity of a significant 88%.

December Temperature in Germantown

In December in Germantown, the average temperature is 8°C (47°F). Maximum temperatures can reach 25°C (77°F), while the minimum can drop as low as -10°C (15°F). Be prepared for a wide range of temperatures when traveling to Germantown during this time.

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

The chart illustrates December temperature patterns in Germantown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Germantown, December typically has an average temperature of 8°C (47°F), with highs reaching up to 25°C (77°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec424655617178817976645047
Data source: Temperature data for Germantown 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 Germantown

In Germantown in December, the total precipitation amount is 148 mm (5.8 in) recorded over a span of 10 days.

December Precipitation Trends in Germantown

The chart displays monthly precipitation patterns in Germantown, 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 Germantown, December typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10817716914411913014312310110977148
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Germantown

In Germantown in December, humidity is 88%. With an average temperature of 8°C (47°F), this humidity feels like a thick, damp blanket wrapping around you, making even short walks feel heavy and uninviting for travel.

December Average Humidity in Germantown

This chart illustrates the average monthly humidity levels in Germantown, 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 Germantown is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Germantown

In Germantown 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 Germantown, you can check the information here.

Maximum UV Index Levels in Germantown for December

The chart shows the monthly maximum UV Index (UVI) for Germantown 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 Germantown typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Germantown 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 Germantown Compares to Other Months

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

This table compares monthly weather conditions in Germantown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)108 mm (4.3 inches)86%moderate
February Weather8°C (46°F)176 mm (6.9 inches)85%high
March Weather13°C (55°F)169 mm (6.7 inches)84%high
April Weather16°C (61°F)144 mm (5.7 inches)81%very high
May Weather22°C (72°F)119 mm (4.7 inches)83%very high
June Weather26°C (78°F)130 mm (5.1 inches)83%extreme
July Weather27°C (81°F)143 mm (5.6 inches)80%extreme
August Weather26°C (80°F)123 mm (4.9 inches)73%very high
September Weather24°C (76°F)101 mm (4.0 inches)70%very high
October Weather18°C (65°F)108 mm (4.3 inches)73%high
November Weather10°C (51°F)77 mm (3.0 inches)85%moderate
December Weather8°C (47°F)148 mm (5.8 inches)88%moderate

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