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December Weather in Winchester, United States

Last updated: June 24, 2025

In December, the average temperature in Winchester, United States hovers around 2°C (35°F). Expect a chilly range, with minimums plummeting to -21°C (-5°F) and highs reaching up to 17°C (63°F). The weather is quite humid, with an average humidity of 86%, and you can anticipate 72 mm (2.8 in) of precipitation spread over 10 days. Prepare accordingly for this brisk winter month!

December Temperature in Winchester

In December in Winchester, the average temperature is 2°C (35°F). Maximum temperatures can reach 17°C (63°F), while the minimum can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures when traveling to Winchester this month.

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

The chart illustrates December temperature patterns in Winchester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Winchester, December typically has an average temperature of 2°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec293241516372757368574135
Data source: Temperature data for Winchester 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 Winchester

In Winchester in December, the total precipitation amount is 72 mm (2.8 in) spread over a duration of 10 days.

December Precipitation Trends in Winchester

The chart displays monthly precipitation patterns in Winchester, 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 Winchester, December typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec74941079813712110510184988472
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Winchester

In Winchester in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in Winchester

This chart illustrates the average monthly humidity levels in Winchester, 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 Winchester is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Winchester

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

Maximum UV Index Levels in Winchester for December

The chart shows the monthly maximum UV Index (UVI) for Winchester 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 Winchester typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
Data source: Winchester 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 Winchester Compares to Other Months

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

This table compares monthly weather conditions in Winchester, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)74 mm (2.9 inches)85%moderate
February Weather0°C (32°F)94 mm (3.7 inches)85%moderate
March Weather5°C (42°F)107 mm (4.2 inches)86%high
April Weather11°C (51°F)98 mm (3.9 inches)87%very high
May Weather17°C (63°F)137 mm (5.4 inches)81%very high
June Weather22°C (72°F)121 mm (4.8 inches)82%extreme
July Weather24°C (76°F)105 mm (4.1 inches)81%very high
August Weather23°C (73°F)101 mm (4.0 inches)79%very high
September Weather20°C (69°F)84 mm (3.3 inches)78%very high
October Weather14°C (57°F)98 mm (3.9 inches)81%high
November Weather5°C (41°F)84 mm (3.3 inches)89%moderate
December Weather2°C (35°F)72 mm (2.8 inches)86%low

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