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December Weather in Maryville, United States

Last updated: June 24, 2025

In December, the average temperature in Maryville, United States hovers around 1°C (34°F). While it can dip to a frigid -22°C (-7°F), the mercury can also rise to a warm 23°C (73°F). Expect about 36 mm (1.4 in) of precipitation over the course of 4 days, with an average humidity of 83% making the air feel quite damp.

December Temperature in Maryville

In December in Maryville, the average temperature is 1°C (34°F). Maximums can reach 23°C (73°F) and minimums can dip as low as -22°C (-7°F). It's advisable to pack layers to stay comfortable amid the wide temperature fluctuations during your travels.

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

The chart illustrates December temperature patterns in Maryville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Maryville, 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 -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec272943526476787570544134
Data source: Temperature data for Maryville 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 Maryville

In Maryville in December, the precipitation amount is 36 mm (1.4 in) over the course of 4 days.

December Precipitation Trends in Maryville

The chart displays monthly precipitation patterns in Maryville, 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 Maryville, December typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec423296851681421181081171464337
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Maryville

In Maryville 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 Maryville

This chart illustrates the average monthly humidity levels in Maryville, 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 Maryville 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 Maryville

In Maryville 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 Maryville, you can check the information here.

Maximum UV Index Levels in Maryville for December

The chart shows the monthly maximum UV Index (UVI) for Maryville 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 Maryville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111099643
Data source: Maryville 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 Maryville Compares to Other Months

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

This table compares monthly weather conditions in Maryville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)42 mm (1.7 inches)78%moderate
February Weather-2°C (29°F)32 mm (1.3 inches)80%moderate
March Weather6°C (44°F)96 mm (3.8 inches)77%high
April Weather11°C (52°F)85 mm (3.3 inches)77%very high
May Weather18°C (65°F)168 mm (6.6 inches)77%very high
June Weather25°C (76°F)142 mm (5.6 inches)81%extreme
July Weather26°C (79°F)118 mm (4.6 inches)81%very high
August Weather24°C (76°F)108 mm (4.2 inches)77%very high
September Weather21°C (70°F)117 mm (4.6 inches)73%very high
October Weather12°C (55°F)146 mm (5.7 inches)75%high
November Weather5°C (42°F)43 mm (1.7 inches)85%moderate
December Weather1°C (34°F)36 mm (1.4 inches)83%moderate

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