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March Weather in Setauket-East Setauket, United States

Last updated: June 24, 2025

In March, the average temperature in Setauket-East Setauket, 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 Setauket-East Setauket

In March in Setauket-East Setauket, 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 Setauket-East Setauket: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Setauket-East Setauket, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Setauket-East Setauket, 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).
JanFebMarAprMayJunJulAugSepOctNovDec353640485868757569614840
Data source: Temperature data for Setauket-East Setauket 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.

March Precipitation in Setauket-East Setauket

In Setauket-East Setauket in March, the precipitation amount is 104 mm (4.1 in) over a period of 10 days.

March Precipitation Trends in Setauket-East Setauket

The chart displays monthly precipitation patterns in Setauket-East Setauket, 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 Setauket-East Setauket, March typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec801121041321198713110394143103140
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Setauket-East Setauket

In Setauket-East Setauket 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 Setauket-East Setauket

This chart illustrates the average monthly humidity levels in Setauket-East Setauket, 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 Setauket-East Setauket is approximately 81%, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Setauket-East Setauket

In Setauket-East Setauket 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 Setauket-East Setauket, you can refer to this Hourly UV Index in Setauket-East Setauket.

Maximum UV Index Levels in Setauket-East Setauket for March

The chart shows the monthly maximum UV Index (UVI) for Setauket-East Setauket 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 Setauket-East Setauket typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Setauket-East Setauket 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 Setauket-East Setauket Compares to Other Months

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

This table compares monthly weather conditions in Setauket-East Setauket, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)80 mm (3.1 inches)84%moderate
February Weather2°C (36°F)112 mm (4.4 inches)82%moderate
March Weather4°C (40°F)104 mm (4.1 inches)81%high
April Weather9°C (49°F)132 mm (5.2 inches)78%very high
May Weather14°C (58°F)119 mm (4.7 inches)69%very high
June Weather20°C (68°F)87 mm (3.4 inches)69%very high
July Weather24°C (76°F)131 mm (5.2 inches)62%very high
August Weather24°C (75°F)103 mm (4.0 inches)65%very high
September Weather21°C (70°F)94 mm (3.7 inches)68%very high
October Weather16°C (61°F)143 mm (5.6 inches)74%high
November Weather9°C (49°F)103 mm (4.0 inches)82%moderate
December Weather5°C (40°F)140 mm (5.5 inches)80%low

Compare Setauket-East Setauket's Climate with Cities Worldwide