January Weather in Port Jervis, United States

Last updated: June 24, 2025

In January, the average temperature in Port Jervis, United States hovers around -2°C (29°F). While it can dip as low as -24°C (-10°F), the mercury may also rise to a pleasant 17°C (62°F). With 71 mm (2.8 in) of precipitation spread over 9 days, be prepared for some wet weather. The air is quite humid, with an average humidity of 84%, making this a uniquely chilly and damp time of year.

January Temperature in Port Jervis

In January in Port Jervis, the average temperature is -2°C (29°F), with maximums reaching 17°C (62°F) and minimums dropping as low as -24°C (-10°F). Be prepared for a wide range of temperatures to make the most of your travel experience.

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

The chart illustrates January 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, January typically has an average temperature of -2°C (29°F), with highs reaching up to 17°C (62°F) and lows dropping to around -24°C (-10°F).

Data source: Temperature data for Port Jervis generated using information from the Copernicus Climate Change Service.

January Precipitation in Port Jervis

In Port Jervis in January, the precipitation amount is 71 mm (2.8 in) spread over 9 days.

January Precipitation Trends in Port Jervis

The chart displays monthly precipitation patterns in Port Jervis, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Port Jervis, January typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Port Jervis

In Port Jervis in January, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.

January Average Humidity in Port Jervis

This chart illustrates the average monthly humidity levels in Port Jervis, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Port Jervis is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Port Jervis

In Port Jervis in January, 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 Port Jervis, you can check the information here.

Maximum UV Index Levels in Port Jervis for January

The chart shows the monthly maximum UV Index (UVI) for Port Jervis in January, 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 January, the maximum UV index in Port Jervis typically reaches 3, which falls under the moderate exposure category.

Data source: Port Jervis January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	71 mm (2.8 inches)	84%	moderate
February Weather	0°C (32°F)	98 mm (3.9 inches)	82%	moderate
March Weather	3°C (37°F)	91 mm (3.6 inches)	81%	high
April Weather	9°C (48°F)	111 mm (4.4 inches)	78%	very high
May Weather	15°C (59°F)	125 mm (4.9 inches)	69%	very high
June Weather	20°C (68°F)	100 mm (3.9 inches)	69%	very high
July Weather	23°C (74°F)	113 mm (4.5 inches)	62%	very high
August Weather	22°C (72°F)	121 mm (4.8 inches)	65%	very high
September Weather	18°C (65°F)	100 mm (3.9 inches)	68%	very high
October Weather	13°C (55°F)	144 mm (5.7 inches)	74%	high
November Weather	5°C (41°F)	88 mm (3.5 inches)	82%	moderate
December Weather	1°C (33°F)	98 mm (3.8 inches)	80%	low