March Weather in Port Jefferson Station, United States

Last updated: June 24, 2025

In March, the average temperature in Port Jefferson Station, United States hovers around 4°C (40°F). Expect a range from a chilly -8°C (17°F) to a pleasant 19°C (67°F). Rainfall is common, with an average of 104 mm (4.1 in) over about 10 days, and the air carries an average humidity of 81%.

March Temperature in Port Jefferson Station

In March in Port Jefferson Station, the average temperature is 4°C (40°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -8°C (17°F). Travelers should be prepared for chilly weather, but may also enjoy some milder days during this month.

March Weather in Port Jefferson Station: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Port Jefferson Station, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Jefferson Station, March typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (67°F) and lows dropping to around -8°C (17°F).

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

March Precipitation in Port Jefferson Station

In Port Jefferson Station in March, the precipitation amount is 104 mm (4.1 in) over a period of 10 days.

March Precipitation Trends in Port Jefferson Station

The chart displays monthly precipitation patterns in Port Jefferson Station, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Port Jefferson Station, March typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Port Jefferson Station

In Port Jefferson Station in March humidity is 81%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that can make traveling quite uncomfortable, as the cold air clings uncomfortably to your skin and the moisture can quickly sap your body heat.

March Average Humidity in Port Jefferson Station

This chart illustrates the average monthly humidity levels in Port Jefferson Station, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Port Jefferson Station is approximately 81%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Port Jefferson Station

In Port Jefferson Station in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Port Jefferson Station, you can refer to this Hourly UV Index in Port Jefferson Station.

Maximum UV Index Levels in Port Jefferson Station for March

The chart shows the monthly maximum UV Index (UVI) for Port Jefferson Station in March, 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 March, the maximum UV index in Port Jefferson Station typically reaches 6, which falls under the high exposure category.

Data source: Port Jefferson Station March 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 March Weather in Port Jefferson Station Compares to Other Months

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

This table compares monthly weather conditions in Port Jefferson Station, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	80 mm (3.1 inches)	84%	moderate
February Weather	2°C (36°F)	112 mm (4.4 inches)	82%	moderate
March Weather	4°C (40°F)	104 mm (4.1 inches)	81%	high
April Weather	9°C (49°F)	132 mm (5.2 inches)	78%	very high
May Weather	14°C (58°F)	119 mm (4.7 inches)	69%	very high
June Weather	20°C (68°F)	87 mm (3.4 inches)	69%	very high
July Weather	24°C (76°F)	131 mm (5.2 inches)	62%	very high
August Weather	24°C (75°F)	103 mm (4.0 inches)	65%	very high
September Weather	21°C (70°F)	94 mm (3.7 inches)	68%	very high
October Weather	16°C (61°F)	143 mm (5.6 inches)	74%	high
November Weather	9°C (49°F)	103 mm (4.0 inches)	82%	moderate
December Weather	5°C (40°F)	140 mm (5.5 inches)	80%	low