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December Weather in Smithville, United States

Last updated: June 24, 2025

In December, the average temperature in Smithville, United States hovers around 8°C (46°F), with fluctuations that can see lows of -9°C (16°F) and highs reaching 23°C (74°F). Expect 148 mm (5.8 in) of precipitation over approximately 12 days, and be prepared for a high average humidity of 88%.

December Temperature in Smithville

In December in Smithville, the average temperature is 8°C (46°F), with maximums reaching 23°C (74°F) and minimums dropping as low as -9°C (16°F). This variation makes it essential for travelers to pack layers and be prepared for both mild and chilly weather.

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

The chart illustrates December temperature patterns in Smithville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smithville, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653597076797773634946
Data source: Temperature data for Smithville 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 Smithville

In Smithville in December, the precipitation amount is 148 mm (5.8 in), which falls over a span of 12 days.

December Precipitation Trends in Smithville

The chart displays monthly precipitation patterns in Smithville, 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 Smithville, December typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10918916814912613112211712013180148
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Smithville

In Smithville 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 Smithville

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

In Smithville 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 Smithville, you can check the information here.

Maximum UV Index Levels in Smithville for December

The chart shows the monthly maximum UV Index (UVI) for Smithville 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 Smithville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Smithville 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 Smithville Compares to Other Months

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

This table compares monthly weather conditions in Smithville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)108 mm (4.3 inches)87%moderate
February Weather8°C (46°F)189 mm (7.4 inches)87%high
March Weather12°C (53°F)168 mm (6.6 inches)85%very high
April Weather15°C (59°F)149 mm (5.9 inches)82%very high
May Weather21°C (70°F)126 mm (5.0 inches)83%extreme
June Weather24°C (76°F)131 mm (5.1 inches)82%extreme
July Weather26°C (80°F)122 mm (4.8 inches)78%extreme
August Weather25°C (78°F)117 mm (4.6 inches)67%very high
September Weather23°C (74°F)120 mm (4.7 inches)64%very high
October Weather17°C (64°F)130 mm (5.1 inches)74%high
November Weather9°C (49°F)80 mm (3.2 inches)87%moderate
December Weather8°C (46°F)148 mm (5.8 inches)88%moderate

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