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December Weather in New London, United States

Last updated: June 24, 2025

In New London, United States, the average temperature during December is a brisk 3°C (38°F). Expect chilly nights where temperatures can drop to -18°C (-1°F), but daytime can provide a pleasant escape with highs reaching 23°C (74°F). You might encounter 41 mm (1.6 in) of precipitation spread over about 5 days, contributing to an average humidity of 86% that enhances the cool atmosphere.

December Temperature in New London

In December in New London, the average temperature is 3°C (38°F). Maximums can reach 23°C (74°F) and minimums can be as low as -18°C (-1°F). Be prepared for a wide range of temperatures and pack accordingly when traveling to New London during this time.

December Weather in New London: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in New London, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New London, December typically has an average temperature of 3°C (38°F), with highs reaching up to 23°C (74°F) and lows dropping to around -18°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec303345546676797672584337
Data source: Temperature data for New London 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 New London

In New London in December, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

December Precipitation Trends in New London

The chart displays monthly precipitation patterns in New London, 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 New London, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec666112210516411392109731025841
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in New London

In New London in December humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

December Average Humidity in New London

This chart illustrates the average monthly humidity levels in New London, 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 New London is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in New London

In New London 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 New London, you can check the information here.

Maximum UV Index Levels in New London for December

The chart shows the monthly maximum UV Index (UVI) for New London 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 New London typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109643
Data source: New London 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 New London Compares to Other Months

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

This table compares monthly weather conditions in New London, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)66 mm (2.6 inches)82%moderate
February Weather0°C (33°F)61 mm (2.4 inches)80%moderate
March Weather7°C (46°F)122 mm (4.8 inches)80%high
April Weather12°C (54°F)105 mm (4.1 inches)80%very high
May Weather19°C (67°F)164 mm (6.5 inches)82%very high
June Weather25°C (77°F)113 mm (4.5 inches)83%extreme
July Weather26°C (80°F)92 mm (3.6 inches)81%very high
August Weather24°C (76°F)109 mm (4.3 inches)80%very high
September Weather22°C (72°F)73 mm (2.9 inches)76%very high
October Weather14°C (58°F)102 mm (4.0 inches)76%high
November Weather6°C (44°F)58 mm (2.3 inches)85%moderate
December Weather3°C (38°F)41 mm (1.6 inches)86%moderate

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