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December Weather in Port Washington, United States

Last updated: June 24, 2025

In December, the average temperature in Port Washington, United States hovers around 2°C (37°F). Weather can be quite variable, with minimums dipping to -15°C (5°F) and maximums peaking at 18°C (64°F). Expect rain as 103 mm (4.1 in) of precipitation typically falls over 12 days, and prepare for a high average humidity of 86%.

December Temperature in Port Washington

In December in Port Washington, the average temperature is 2°C (37°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm clothing for the cold nights and lighter layers for the warmer days.

December Weather in Port Washington: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Port Washington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Washington, December typically has an average temperature of 2°C (37°F), with highs reaching up to 18°C (64°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec313542526371757368574236
Data source: Temperature data for Port Washington 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 Port Washington

In Port Washington in December, the total precipitation amount is 103 mm (4.1 in), occurring over the course of 12 days.

December Precipitation Trends in Port Washington

The chart displays monthly precipitation patterns in Port Washington, 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 Port Washington, December typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec921141071321301451179711111198103
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Port Washington

In Port Washington in December, humidity is 86%. With an average temperature of 2°C (37°F), this humidity feels like a chilly dampness that clings to your clothes and makes outdoor activities quite uncomfortable for traveling.

December Average Humidity in Port Washington

This chart illustrates the average monthly humidity levels in Port Washington, 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 Port Washington is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Port Washington

In Port Washington in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Port Washington, you can visit Hourly UV Index in Port Washington.

Maximum UV Index Levels in Port Washington for December

The chart shows the monthly maximum UV Index (UVI) for Port Washington 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 Port Washington typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Port Washington 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 Port Washington Compares to Other Months

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

This table compares monthly weather conditions in Port Washington, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)92 mm (3.6 inches)88%moderate
February Weather1°C (35°F)114 mm (4.5 inches)88%moderate
March Weather6°C (42°F)107 mm (4.2 inches)87%high
April Weather11°C (52°F)132 mm (5.2 inches)87%very high
May Weather17°C (63°F)130 mm (5.1 inches)81%very high
June Weather21°C (71°F)145 mm (5.7 inches)83%very high
July Weather24°C (75°F)117 mm (4.6 inches)82%very high
August Weather23°C (73°F)97 mm (3.8 inches)76%very high
September Weather20°C (68°F)111 mm (4.4 inches)77%very high
October Weather14°C (58°F)111 mm (4.4 inches)82%high
November Weather6°C (42°F)98 mm (3.9 inches)89%moderate
December Weather2°C (37°F)103 mm (4.1 inches)86%low

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