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December Weather in Lynn, United States

Last updated: June 24, 2025

In Lynn, United States, the average temperature in December hovers around 9°C (49°F). Expect a wide range, with minimums dipping to -6°C (21°F) and maximums peaking at 24°C (75°F). The climate is quite moist, featuring 158 mm (6.2 in) of precipitation over 13 days, resulting in an average humidity of 88%. Plan accordingly for a chilly yet intriguing experience!

December Temperature in Lynn

In December in Lynn, the average temperature is 9°C (49°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as -6°C (21°F). Be prepared for a wide range of temperatures when traveling, so pack accordingly!

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

The chart illustrates December temperature patterns in Lynn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lynn, December typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (75°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec455057627277808076665248
Data source: Temperature data for Lynn 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 Lynn

In Lynn in December, the precipitation amount is 158 mm (6.2 in) over the course of 13 days.

December Precipitation Trends in Lynn

The chart displays monthly precipitation patterns in Lynn, 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 Lynn, December typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec1191981781651131461071229911776158
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lynn

In Lynn in December, humidity is 88%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

December Average Humidity in Lynn

This chart illustrates the average monthly humidity levels in Lynn, 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 Lynn is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lynn

In Lynn in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Lynn for better planning.

Maximum UV Index Levels in Lynn for December

The chart shows the monthly maximum UV Index (UVI) for Lynn 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 Lynn typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119754
Data source: Lynn 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 Lynn Compares to Other Months

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

This table compares monthly weather conditions in Lynn, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)119 mm (4.7 inches)85%moderate
February Weather10°C (51°F)198 mm (7.8 inches)84%high
March Weather14°C (57°F)178 mm (7.0 inches)82%very high
April Weather17°C (62°F)165 mm (6.5 inches)82%very high
May Weather22°C (72°F)113 mm (4.5 inches)82%extreme
June Weather25°C (78°F)146 mm (5.8 inches)79%extreme
July Weather27°C (81°F)107 mm (4.2 inches)82%extreme
August Weather27°C (80°F)122 mm (4.8 inches)77%extreme
September Weather25°C (76°F)99 mm (3.9 inches)74%very high
October Weather19°C (66°F)117 mm (4.6 inches)73%high
November Weather11°C (52°F)76 mm (3.0 inches)85%moderate
December Weather9°C (49°F)158 mm (6.2 inches)88%moderate

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