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January Weather in East Harwich, United States

Last updated: June 24, 2025

In January, the average temperature in East Harwich, United States hovers around 2°C (37°F). Expect chilly nights with minimums plummeting to -13°C (10°F), while daytime highs can reach a comfortable 12°C (54°F). Be prepared for 94 mm (3.7 in) of precipitation spread over 10 days, contributing to an average humidity of 84%.

January Temperature in East Harwich

In January in East Harwich, the average temperature is 2°C (37°F). Maximum temperatures can reach 12°C (54°F), while the minimum can dip as low as -13°C (10°F). Travelers should be prepared for chilly conditions and pack appropriately for the varying temperatures.

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

The chart illustrates January temperature patterns in East Harwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In East Harwich, January typically has an average temperature of 2°C (37°F), with highs reaching up to 12°C (54°F) and lows dropping to around -13°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec363638455261697066594840
Data source: Temperature data for East Harwich 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 Harwich

In East Harwich in January, the precipitation amount is 94 mm (3.7 in) over a duration of 10 days.

January Precipitation Trends in East Harwich

The chart displays monthly precipitation patterns in East Harwich, 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 Harwich, January typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec95124119131121887783116169106138
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in East Harwich

In East Harwich in January, humidity is 84%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for layered clothing to stay warm and dry.

January Average Humidity in East Harwich

This chart illustrates the average monthly humidity levels in East Harwich, 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 Harwich is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in East Harwich

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

Maximum UV Index Levels in East Harwich for January

The chart shows the monthly maximum UV Index (UVI) for East Harwich 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 Harwich typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: East Harwich 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 Harwich Compares to Other Months

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

This table compares monthly weather conditions in East Harwich, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)94 mm (3.7 inches)84%moderate
February Weather2°C (37°F)124 mm (4.9 inches)84%moderate
March Weather3°C (38°F)119 mm (4.7 inches)82%high
April Weather7°C (45°F)131 mm (5.1 inches)79%very high
May Weather11°C (52°F)121 mm (4.8 inches)75%very high
June Weather16°C (61°F)88 mm (3.5 inches)78%very high
July Weather20°C (69°F)77 mm (3.0 inches)76%very high
August Weather21°C (71°F)83 mm (3.3 inches)76%very high
September Weather19°C (66°F)116 mm (4.6 inches)75%very high
October Weather15°C (59°F)169 mm (6.7 inches)75%high
November Weather9°C (49°F)106 mm (4.2 inches)80%moderate
December Weather5°C (41°F)138 mm (5.4 inches)80%low

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