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December Weather in Unionville, United States

Last updated: June 24, 2025

In December, the average temperature in Unionville, United States hovers around 8°C (46°F), with a minimum of -9°C (17°F) and a maximum reaching 23°C (73°F). Expect 147 mm (5.8 in) of precipitation spread over 11 days, contributing to an average humidity of 88%.

December Temperature in Unionville

In December in Unionville, the average temperature is 8°C (46°F). The maximum can reach 23°C (73°F) and the minimum can be as low as -9°C (17°F). Be prepared for a range of temperatures if you plan to travel during this time, so pack accordingly!

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 8°C (46°F), with highs reaching up to 23°C (73°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec424654607076797874644946
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 total precipitation amount is 147 mm (5.8 in), occurring over the course of 11 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 147 mm (5.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec11518818015611513814311511712276147
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 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

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 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec36810101111109753
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 Weather5°C (42°F)115 mm (4.5 inches)87%moderate
February Weather8°C (47°F)188 mm (7.4 inches)87%high
March Weather12°C (54°F)180 mm (7.1 inches)85%very high
April Weather15°C (60°F)156 mm (6.1 inches)82%very high
May Weather21°C (70°F)115 mm (4.5 inches)83%very high
June Weather25°C (76°F)138 mm (5.4 inches)82%extreme
July Weather26°C (80°F)143 mm (5.6 inches)78%extreme
August Weather25°C (78°F)115 mm (4.5 inches)67%very high
September Weather23°C (74°F)117 mm (4.6 inches)64%very high
October Weather18°C (64°F)122 mm (4.8 inches)74%high
November Weather10°C (49°F)76 mm (3.0 inches)87%moderate
December Weather8°C (46°F)147 mm (5.8 inches)88%moderate

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