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December Weather in Lowell, United States

Last updated: June 24, 2025

In December, the average temperature in Lowell, United States is a crisp 1°C (34°F), with a minimum of -20°C (-4°F) and a maximum reaching 18°C (65°F). Expect 56 mm (2.2 in) of precipitation over 7 days, paired with a high average humidity of 84%. Be prepared for some chilly and wet days!

December Temperature in Lowell

In December in Lowell, the average temperature is 1°C (34°F). Maximum temperatures can reach 18°C (65°F), while minimums can drop as low as -20°C (-4°F). It's a great time for travelers to experience a mix of chilly and mild weather, so prepare for varied conditions when exploring the area.

December Weather in Lowell: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lowell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lowell, December typically has an average temperature of 1°C (34°F), with highs reaching up to 18°C (65°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec272940506273767468554034
Data source: Temperature data for Lowell 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.

December Precipitation in Lowell

In Lowell in December, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.

December Precipitation Trends in Lowell

The chart displays monthly precipitation patterns in Lowell, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lowell, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec707198118163120109101741326657
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lowell

In Lowell in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

December Average Humidity in Lowell

This chart illustrates the average monthly humidity levels in Lowell, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lowell is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lowell

In Lowell in December, 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 Lowell, you can visit Hourly UV Index in Lowell.

Maximum UV Index Levels in Lowell for December

The chart shows the monthly maximum UV Index (UVI) for Lowell in December, 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 December, the maximum UV index in Lowell typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Lowell December 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 December Weather in Lowell Compares to Other Months

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

This table compares monthly weather conditions in Lowell, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)70 mm (2.8 inches)82%moderate
February Weather-2°C (29°F)71 mm (2.8 inches)83%moderate
March Weather5°C (41°F)98 mm (3.9 inches)84%high
April Weather10°C (50°F)118 mm (4.6 inches)85%very high
May Weather17°C (62°F)163 mm (6.4 inches)79%very high
June Weather23°C (73°F)120 mm (4.7 inches)82%very high
July Weather24°C (76°F)109 mm (4.3 inches)80%very high
August Weather23°C (74°F)101 mm (4.0 inches)81%very high
September Weather20°C (69°F)74 mm (2.9 inches)80%very high
October Weather13°C (56°F)132 mm (5.2 inches)82%high
November Weather4°C (40°F)66 mm (2.6 inches)88%moderate
December Weather1°C (34°F)56 mm (2.2 inches)84%low

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