December Weather in Unionville, United States

Last updated: June 24, 2025

In December, the average temperature in Unionville, United States hovers around 1°C (34°F). Expect a chilly range where the minimum can dip to -25°C (-13°F) and the maximum can reach up to 23°C (73°F). This month also sees an average precipitation of 35 mm (1.4 in) spread over 5 days, coupled with a notable humidity level of 83%. Stay prepared for a variety of weather conditions!

December Temperature in Unionville

In December in Unionville, the average temperature is 1°C (34°F). Maximums can reach 23°C (73°F), and minimums can be as low as -25°C (-13°F). It's essential to be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Unionville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Unionville, December typically has an average temperature of 1°C (34°F), with highs reaching up to 23°C (73°F) and lows dropping to around -25°C (-13°F).
JanFebMarAprMayJunJulAugSepOctNovDec252842516475787569544034
Data source: Temperature data for Unionville 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 Unionville

In Unionville in December, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.

December Precipitation Trends in Unionville

The chart displays monthly precipitation patterns in Unionville, 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 Unionville, December typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec52501018215512096831201295235
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Unionville

In Unionville in December, humidity is 83%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making travel uncomfortable as the damp cold seeps into your bones, adding an extra layer of heaviness to the air that can leave you feeling sluggish and fatigued.

December Average Humidity in Unionville

This chart illustrates the average monthly humidity levels in Unionville, 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 Unionville is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Unionville

In Unionville 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 Unionville, you can check the information here.

Maximum UV Index Levels in Unionville for December

The chart shows the monthly maximum UV Index (UVI) for Unionville 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 Unionville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111108643
Data source: Unionville 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 Unionville Compares to Other Months

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

This table compares monthly weather conditions in Unionville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)51 mm (2.0 inches)78%moderate
February Weather-2°C (28°F)50 mm (2.0 inches)80%moderate
March Weather6°C (42°F)101 mm (4.0 inches)77%high
April Weather10°C (51°F)82 mm (3.2 inches)77%very high
May Weather18°C (64°F)155 mm (6.1 inches)77%very high
June Weather24°C (76°F)120 mm (4.7 inches)81%extreme
July Weather26°C (79°F)96 mm (3.8 inches)81%extreme
August Weather24°C (75°F)83 mm (3.3 inches)77%very high
September Weather21°C (70°F)120 mm (4.7 inches)73%very high
October Weather12°C (54°F)129 mm (5.1 inches)75%high
November Weather5°C (40°F)52 mm (2.0 inches)85%moderate
December Weather1°C (34°F)35 mm (1.4 inches)83%moderate

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