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December Weather in Lowell, United States

Last updated: June 24, 2025

In December, the average temperature in Lowell, United States hovers around 8°C (47°F), with a minimum dipping to -7°C (20°F) and a maximum peaking at 26°C (79°F). Expect about 118 mm (4.7 in) of precipitation spread over 9 days, all while enjoying a relatively high average humidity of 87%. Stay prepared for a mix of weather this month!

December Temperature in Lowell

In December in Lowell, the average temperature is 8°C (47°F), with maximums reaching 26°C (79°F) and minimums dropping as low as -7°C (20°F). Be prepared for a wide range of temperatures when traveling to Lowell during this month.

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 8°C (47°F), with highs reaching up to 26°C (79°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec444954627177817975655147
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 precipitation amount is 118 mm (4.7 in), occurring over a span of 9 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 118 mm (4.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec88112821011036788851159188118
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 87%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortably muggy despite the cool 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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
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 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 Lowell, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
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 Weather6°C (44°F)88 mm (3.5 inches)86%moderate
February Weather10°C (49°F)112 mm (4.4 inches)85%high
March Weather12°C (54°F)81 mm (3.2 inches)84%very high
April Weather17°C (63°F)101 mm (4.0 inches)82%very high
May Weather22°C (72°F)103 mm (4.1 inches)83%very high
June Weather25°C (78°F)67 mm (2.6 inches)82%extreme
July Weather27°C (82°F)88 mm (3.5 inches)80%extreme
August Weather26°C (79°F)85 mm (3.3 inches)74%very high
September Weather24°C (75°F)115 mm (4.5 inches)75%very high
October Weather18°C (65°F)91 mm (3.6 inches)79%very high
November Weather11°C (51°F)88 mm (3.5 inches)87%moderate
December Weather8°C (47°F)118 mm (4.7 inches)87%moderate

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