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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 7°C (46°F). Expect a range of -10°C (14°F) to 22°C (72°F), showcasing the area's diverse weather. With an average precipitation of 146 mm (5.7 in) spread over 11 days, it's wise to prepare for some rainfall. Additionally, the humidity can be quite high, averaging around 88%, adding to the cool ambiance of the season.

December Temperature in Winchester

In December in Winchester, the average temperature is 7°C (46°F). Maximum temperatures can reach 22°C (72°F), while minimums can drop as low as -10°C (14°F). Be prepared for a range of weather conditions, from mild daytimes to potentially chilly nights, when planning your travel.

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 7°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653596975787773634945
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 precipitation amount is 146 mm (5.7 in) spread over 11 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 146 mm (5.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10817919714910712712311510711372146
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 88%. With an average temperature of 7°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring you to dress in layers to stay warm and dry while exploring.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
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 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 Winchester for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109754
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 Weather5°C (41°F)108 mm (4.3 inches)87%moderate
February Weather8°C (47°F)178 mm (7.0 inches)87%high
March Weather12°C (53°F)197 mm (7.8 inches)85%very high
April Weather15°C (59°F)148 mm (5.8 inches)82%very high
May Weather20°C (69°F)107 mm (4.2 inches)83%extreme
June Weather24°C (75°F)127 mm (5.0 inches)82%extreme
July Weather26°C (79°F)123 mm (4.8 inches)78%extreme
August Weather25°C (77°F)115 mm (4.5 inches)67%very high
September Weather23°C (73°F)107 mm (4.2 inches)64%very high
October Weather17°C (63°F)112 mm (4.4 inches)74%high
November Weather9°C (49°F)72 mm (2.8 inches)87%moderate
December Weather7°C (46°F)146 mm (5.7 inches)88%moderate

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