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January Weather in Plymouth, United States

Last updated: June 24, 2025

In January, the average temperature in Plymouth, United States hovers around -3°C (27°F). Expect a chilly range, with minimums dipping to -26°C (-15°F) and occasional highs reaching 15°C (59°F). During this month, precipitation totals approximately 64 mm (2.5 in) over 8 days, creating a humid atmosphere with an average humidity of 88%. Stay warm and prepared for the weather!

January Temperature in Plymouth

In January in Plymouth, the average temperature is -3°C (27°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -26°C (-15°F). It's advisable to pack warm clothing and be prepared for a wide range of temperatures during your travels.

January Weather in Plymouth: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plymouth, January typically has an average temperature of -3°C (27°F), with highs reaching up to 15°C (59°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec272837476070757366543933
Data source: Temperature data for Plymouth 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 Plymouth

In Plymouth in January, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

January Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, 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 Plymouth, January typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec6466738711785927462987754
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Plymouth

In Plymouth in January humidity is 88%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration less inviting as the dampness clings to your clothing and slows your movements.

January Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, 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 Plymouth is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Plymouth

In Plymouth in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Plymouth, you can visit Hourly UV Index in Plymouth.

Maximum UV Index Levels in Plymouth for January

The chart shows the monthly maximum UV Index (UVI) for Plymouth 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 Plymouth typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
Data source: Plymouth 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 Plymouth Compares to Other Months

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

This table compares monthly weather conditions in Plymouth, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)64 mm (2.5 inches)88%low
February Weather-2°C (29°F)66 mm (2.6 inches)87%moderate
March Weather3°C (38°F)73 mm (2.9 inches)85%moderate
April Weather8°C (47°F)86 mm (3.4 inches)86%very high
May Weather15°C (60°F)117 mm (4.6 inches)80%very high
June Weather21°C (71°F)85 mm (3.3 inches)80%very high
July Weather24°C (75°F)91 mm (3.6 inches)80%very high
August Weather23°C (73°F)74 mm (2.9 inches)80%very high
September Weather19°C (66°F)62 mm (2.4 inches)80%high
October Weather12°C (55°F)98 mm (3.9 inches)84%moderate
November Weather4°C (40°F)77 mm (3.0 inches)89%moderate
December Weather0°C (33°F)54 mm (2.1 inches)86%low

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