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January Weather in East Setauket, United States

Last updated: June 24, 2025

In January, the average temperature in East Setauket, United States hovers around 2°C (35°F). During this time, you might experience a chilly minimum of -15°C (6°F) and the occasional warm spell reaching up to 15°C (60°F). Expect about 80 mm (3.1 in) of precipitation spread over 8 days, contributing to a relatively high average humidity of 84%. Prepare accordingly!

January Temperature in East Setauket

In January in East Setauket, the average temperature is 2°C (35°F). The maximum can reach 15°C (60°F) and the minimum can be as low as -15°C (6°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

January Weather in East Setauket: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in 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 East Setauket, January typically has an average temperature of 2°C (35°F), with highs reaching up to 15°C (60°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec353640485868757569614840
Data source: Temperature data for 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.

January Precipitation in East Setauket

In East Setauket in January, the precipitation amount is 80 mm (3.1 in) over a period of 8 days.

January Precipitation Trends in East Setauket

The chart displays monthly precipitation patterns in East Setauket, 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 East Setauket, January typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec801121041321198713110394143103140
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in East Setauket

In East Setauket in January, humidity is 84%. With an average temperature of 2°C (35°F), this humidity feels like an uncomfortable chill that penetrates your bones, making outdoor travel quite brisk and uninviting.

January Average Humidity in East Setauket

This chart illustrates the average monthly humidity levels in East Setauket, 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 East Setauket is approximately 84%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in East Setauket

In East Setauket 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 East Setauket, you can check the information here.

Maximum UV Index Levels in East Setauket for January

The chart shows the monthly maximum UV Index (UVI) for East Setauket 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 East Setauket typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: East Setauket 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 East Setauket Compares to Other Months

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

This table compares monthly weather conditions in East Setauket, showing how January’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

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