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December Weather in Georgetown, United States

Last updated: June 24, 2025

In December, the average temperature in Georgetown, United States hovers around 4°C (40°F), with potential extremes ranging from a chilly -14°C (7°F) to a delightful 20°C (68°F). Expect 123 mm (4.8 in) of precipitation spread across 11 days, contributing to an average humidity of 87%. Don't forget your umbrella!

December Temperature in Georgetown

In December in Georgetown, the average temperature is 4°C (40°F). Maximums can reach 20°C (68°F), while minimums can drop as low as -14°C (7°F). Be prepared for a wide range of temperatures when traveling during this time.

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 4°C (40°F), with highs reaching up to 20°C (68°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec343846556673777570594439
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 precipitation amount is 123 mm (4.8 in) occurring over the course of 11 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 123 mm (4.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec891291281401311731219211510592123
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 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

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.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%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 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 Georgetown, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
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 Weather1°C (35°F)89 mm (3.5 inches)88%moderate
February Weather4°C (39°F)129 mm (5.1 inches)88%moderate
March Weather8°C (46°F)128 mm (5.0 inches)87%high
April Weather13°C (55°F)140 mm (5.5 inches)85%very high
May Weather19°C (66°F)131 mm (5.2 inches)81%very high
June Weather23°C (73°F)173 mm (6.8 inches)82%very high
July Weather25°C (77°F)121 mm (4.8 inches)81%very high
August Weather24°C (75°F)92 mm (3.6 inches)73%very high
September Weather21°C (71°F)115 mm (4.5 inches)73%very high
October Weather15°C (60°F)105 mm (4.1 inches)78%high
November Weather7°C (45°F)92 mm (3.6 inches)89%moderate
December Weather4°C (40°F)123 mm (4.8 inches)87%moderate

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