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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 9°C (49°F), with a range that can drop to a chilly -1°C (31°F) and peak at a warm 24°C (76°F). Expect light rain, with an average precipitation of 13 mm (0.5 in) over approximately 3 days. Additionally, the average humidity is relatively high at 78%, contributing to a cozy atmosphere throughout the month.

December Temperature in Winchester

In December in Winchester, the average temperature is 9°C (49°F). The maximum can reach 24°C (76°F), and the minimum can be as low as -1°C (31°F). Be sure to pack layers to accommodate the varying temperatures during your travels.

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 9°C (49°F), with highs reaching up to 24°C (76°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec495259697689939284695848
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 13 mm (0.5 in) over a span of 3 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 13 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec192118361135231314
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 78%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while traveling, as the cool air combines with the moisture to create a brisk and invigorating atmosphere.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%84%76%64%48%40%33%29%43%61%76%78%
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 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 Winchester, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112131110753
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 Weather9°C (49°F)19 mm (0.8 inches)81%moderate
February Weather11°C (52°F)20 mm (0.8 inches)84%high
March Weather15°C (60°F)17 mm (0.7 inches)76%very high
April Weather21°C (70°F)3 mm (0.1 inches)64%very high
May Weather25°C (76°F)6 mm (0.2 inches)48%extreme
June Weather32°C (89°F)1 mm (0.0 inches)40%extreme
July Weather34°C (94°F)13 mm (0.5 inches)33%extreme
August Weather34°C (93°F)5 mm (0.2 inches)29%extreme
September Weather29°C (84°F)2 mm (0.1 inches)43%very high
October Weather20°C (69°F)3 mm (0.1 inches)61%high
November Weather15°C (59°F)13 mm (0.5 inches)76%moderate
December Weather9°C (49°F)13 mm (0.5 inches)78%moderate

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