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December Weather in Norwich, United States

Last updated: June 24, 2025

In December, the average temperature in Norwich, United States hovers around -1°C (30°F). While chilly days can bring minimums as low as -20°C (-4°F), some warmer spells may reach up to 16°C (61°F). With 98 mm (3.9 in) of precipitation spread over 13 days, expect a damp atmosphere, complemented by a high average humidity of 86%.

December Temperature in Norwich

In December in Norwich, the average temperature is -1°C (30°F). Maximum temperatures can reach 16°C (61°F), while minimum temperatures can drop as low as -20°C (-4°F). It's essential to pack appropriately for your travels, as you can experience a wide range of temperatures during this month.

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

The chart illustrates December temperature patterns in Norwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Norwich, December typically has an average temperature of -1°C (30°F), with highs reaching up to 16°C (61°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455765706862523729
Data source: Temperature data for Norwich 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 Norwich

In Norwich in December, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.

December Precipitation Trends in Norwich

The chart displays monthly precipitation patterns in Norwich, 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 Norwich, December typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8596881191271091341179815610398
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Norwich

In Norwich in December, humidity is 86%. With an average temperature of -1°C (30°F), this humidity feels like a heavy blanket wrapping around you, making traveling feel much colder and more uncomfortable than the temperature suggests.

December Average Humidity in Norwich

This chart illustrates the average monthly humidity levels in Norwich, 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 Norwich is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Norwich

In Norwich 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 Norwich, you can visit Hourly UV Index in Norwich.

Maximum UV Index Levels in Norwich for December

The chart shows the monthly maximum UV Index (UVI) for Norwich 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 Norwich typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910101098642
Data source: Norwich 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 Norwich Compares to Other Months

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

This table compares monthly weather conditions in Norwich, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)85 mm (3.4 inches)90%moderate
February Weather-3°C (27°F)96 mm (3.8 inches)90%moderate
March Weather0°C (33°F)88 mm (3.5 inches)87%high
April Weather7°C (45°F)119 mm (4.7 inches)88%very high
May Weather14°C (57°F)127 mm (5.0 inches)82%very high
June Weather18°C (65°F)109 mm (4.3 inches)79%very high
July Weather21°C (70°F)134 mm (5.3 inches)78%very high
August Weather20°C (68°F)117 mm (4.6 inches)76%very high
September Weather16°C (62°F)98 mm (3.9 inches)78%very high
October Weather11°C (52°F)156 mm (6.1 inches)84%high
November Weather3°C (37°F)103 mm (4.1 inches)89%moderate
December Weather-1°C (30°F)98 mm (3.9 inches)86%low

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