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December Weather in Port Leyden, United States

Last updated: June 24, 2025

The average temperature in Port Leyden, United States during December is a chilly -3°C (26°F), with extremes ranging from a frigid -27°C (-15°F) to a mild 15°C (59°F). Expect 137 mm (5.4 in) of precipitation spread over 17 days, contributing to an average humidity of 86%. Bundle up and prepare for some brisk weather!

December Temperature in Port Leyden

In December in Port Leyden, the average temperature is -3°C (26°F), with maximums reaching up to 15°C (59°F) and minimums dropping as low as -27°C (-15°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for both cold and mild conditions.

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

The chart illustrates December temperature patterns in Port Leyden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Leyden, December typically has an average temperature of -3°C (26°F), with highs reaching up to 15°C (59°F) and lows dropping to around -27°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec202430435564696760503426
Data source: Temperature data for Port Leyden 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 Leyden

In Port Leyden in December, the total precipitation amount is 137 mm (5.4 in), occurring over a span of 17 days.

December Precipitation Trends in Port Leyden

The chart displays monthly precipitation patterns in Port Leyden, 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 Leyden, December typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec11612010413813412918514190184142137
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Port Leyden

In Port Leyden in December humidity is 86%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that penetrates your clothing, making it essential to bundle up tightly if you're planning to explore the area.

December Average Humidity in Port Leyden

This chart illustrates the average monthly humidity levels in Port Leyden, 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 Leyden is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Port Leyden

In Port Leyden 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 Leyden, you can visit Hourly UV Index in Port Leyden.

Maximum UV Index Levels in Port Leyden for December

The chart shows the monthly maximum UV Index (UVI) for Port Leyden 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 Leyden typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Port Leyden 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 Leyden Compares to Other Months

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

This table compares monthly weather conditions in Port Leyden, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)116 mm (4.6 inches)90%moderate
February Weather-5°C (24°F)120 mm (4.7 inches)90%moderate
March Weather-1°C (30°F)104 mm (4.1 inches)87%high
April Weather6°C (43°F)138 mm (5.4 inches)88%very high
May Weather13°C (56°F)134 mm (5.3 inches)82%very high
June Weather18°C (64°F)129 mm (5.1 inches)79%very high
July Weather21°C (69°F)185 mm (7.3 inches)78%very high
August Weather19°C (67°F)141 mm (5.5 inches)76%very high
September Weather16°C (60°F)90 mm (3.5 inches)78%very high
October Weather10°C (50°F)184 mm (7.3 inches)84%high
November Weather1°C (35°F)141 mm (5.6 inches)89%moderate
December Weather-3°C (26°F)137 mm (5.4 inches)86%low

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