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December Weather in Georgetown, United States

Last updated: June 24, 2025

In Georgetown, United States, the average temperature in December hovers around 12°C (54°F). You can expect a chilly minimum of -3°C (28°F), with highs reaching up to 28°C (83°F). Precipitation is moderate, averaging 64 mm (2.5 in) over 6 days, while the air remains quite humid at 87%.

December Temperature in Georgetown

In December in Georgetown, the average temperature is 12°C (54°F), with maximums reaching 28°C (83°F) and minimums dropping as low as -3°C (28°F). This diverse range of temperatures makes it important to pack for both warm days and chilly nights when traveling.

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

The chart illustrates December temperature patterns in Georgetown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Georgetown, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec505263687682858679705954
Data source: Temperature data for Georgetown 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 Georgetown

In Georgetown in December, the total precipitation amount is 64 mm (2.5 in) during a span of 6 days.

December Precipitation Trends in Georgetown

The chart displays monthly precipitation patterns in Georgetown, 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 Georgetown, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec526473861737870971031014464
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Georgetown

In Georgetown in December humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.

December Average Humidity in Georgetown

This chart illustrates the average monthly humidity levels in Georgetown, 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 Georgetown is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Georgetown

In Georgetown in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Georgetown for better planning.

Maximum UV Index Levels in Georgetown for December

The chart shows the monthly maximum UV Index (UVI) for Georgetown 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 Georgetown typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111864
Data source: Georgetown 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 Georgetown Compares to Other Months

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

This table compares monthly weather conditions in Georgetown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)52 mm (2.0 inches)78%moderate
February Weather11°C (52°F)64 mm (2.5 inches)78%high
March Weather17°C (63°F)73 mm (2.9 inches)77%very high
April Weather20°C (68°F)86 mm (3.4 inches)78%extreme
May Weather24°C (76°F)172 mm (6.8 inches)82%extreme
June Weather28°C (82°F)78 mm (3.1 inches)78%extreme
July Weather30°C (85°F)70 mm (2.8 inches)69%extreme
August Weather30°C (86°F)97 mm (3.8 inches)63%extreme
September Weather26°C (80°F)103 mm (4.1 inches)66%extreme
October Weather21°C (70°F)101 mm (4.0 inches)73%very high
November Weather15°C (59°F)44 mm (1.7 inches)84%high
December Weather12°C (54°F)64 mm (2.5 inches)87%moderate

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