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December Weather in Port Jervis, United States

Last updated: June 24, 2025

In December, the average temperature in Port Jervis, United States hovers around 1°C (33°F), making it a chilly time of year. Expect minimums dipping to -15°C (5°F) and maximums reaching 16°C (61°F). This month also brings 98 mm (3.8 in) of precipitation over approximately 11 days, with humidity levels averaging 80%.

December Temperature in Port Jervis

In December in Port Jervis, the average temperature is 1°C (33°F). The maximum can reach 16°C (61°F), while the minimum can drop as low as -15°C (5°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Port Jervis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Jervis, December typically has an average temperature of 1°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec293237485968737165554133
Data source: Temperature data for Port Jervis 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 Jervis

In Port Jervis in December, the precipitation amount is 98 mm (3.8 in) over the course of 11 days.

December Precipitation Trends in Port Jervis

The chart displays monthly precipitation patterns in Port Jervis, 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 Jervis, December typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7198911111251001131211001448898
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Port Jervis

In Port Jervis in December, humidity is 80%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill that seeps into your bones, making travel outdoors an invigorating yet biting experience.

December Average Humidity in Port Jervis

This chart illustrates the average monthly humidity levels in Port Jervis, 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 Jervis is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Port Jervis

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

Maximum UV Index Levels in Port Jervis for December

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

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

This table compares monthly weather conditions in Port Jervis, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)71 mm (2.8 inches)84%moderate
February Weather0°C (32°F)98 mm (3.9 inches)82%moderate
March Weather3°C (37°F)91 mm (3.6 inches)81%high
April Weather9°C (48°F)111 mm (4.4 inches)78%very high
May Weather15°C (59°F)125 mm (4.9 inches)69%very high
June Weather20°C (68°F)100 mm (3.9 inches)69%very high
July Weather23°C (74°F)113 mm (4.5 inches)62%very high
August Weather22°C (72°F)121 mm (4.8 inches)65%very high
September Weather18°C (65°F)100 mm (3.9 inches)68%very high
October Weather13°C (55°F)144 mm (5.7 inches)74%high
November Weather5°C (41°F)88 mm (3.5 inches)82%moderate
December Weather1°C (33°F)98 mm (3.8 inches)80%low

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