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December Weather in Washington Mills, United States

Last updated: June 24, 2025

In December, the average temperature in Washington Mills, United States hovers around -2°C (30°F), with the minimum plummeting to a chilly -23°C (-9°F) and a maximum reaching up to 17°C (62°F). Expect about 110 mm (4.3 in) of precipitation over 16 days, coupled with a high average humidity of 86%. Prepare for a frosty yet intriguing month!

December Temperature in Washington Mills

In December in Washington Mills, the average temperature is -2°C (30°F). The maximum can reach 17°C (62°F) and the minimum can be as low as -23°C (-9°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

December Weather in Washington Mills: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Washington Mills, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Washington Mills, December typically has an average temperature of -2°C (30°F), with highs reaching up to 17°C (62°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455766716962523729
Data source: Temperature data for Washington Mills 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 Washington Mills

In Washington Mills in December, the precipitation amount is 110 mm (4.3 in) over a span of 16 days.

December Precipitation Trends in Washington Mills

The chart displays monthly precipitation patterns in Washington Mills, 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 Washington Mills, December typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec941069612613412116213296175115110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Washington Mills

In Washington Mills in December, humidity is 86%. With an average temperature of -2°C (30°F), this humidity feels like a biting chill that punctuates the air, making it essential for travelers to bundle up to stay warm and navigate the frosty environment with care.

December Average Humidity in Washington Mills

This chart illustrates the average monthly humidity levels in Washington Mills, 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 Washington Mills 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 Washington Mills

In Washington Mills 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 Washington Mills, you can visit Hourly UV Index in Washington Mills.

Maximum UV Index Levels in Washington Mills for December

The chart shows the monthly maximum UV Index (UVI) for Washington Mills 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 Washington Mills typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Washington Mills 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 Washington Mills Compares to Other Months

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

This table compares monthly weather conditions in Washington Mills, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)94 mm (3.7 inches)90%moderate
February Weather-3°C (27°F)106 mm (4.2 inches)90%moderate
March Weather1°C (33°F)96 mm (3.8 inches)87%high
April Weather7°C (45°F)126 mm (5.0 inches)88%very high
May Weather14°C (58°F)133 mm (5.3 inches)82%very high
June Weather19°C (66°F)121 mm (4.8 inches)79%very high
July Weather22°C (71°F)161 mm (6.4 inches)78%very high
August Weather20°C (69°F)132 mm (5.2 inches)76%very high
September Weather17°C (62°F)96 mm (3.8 inches)78%very high
October Weather11°C (52°F)175 mm (6.9 inches)84%high
November Weather3°C (37°F)115 mm (4.5 inches)89%moderate
December Weather-2°C (30°F)110 mm (4.3 inches)86%low

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