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December Weather in Tarkio, United States

Last updated: June 24, 2025

In Tarkio, United States, the average temperature in December hovers around 1°C (34°F). Expect chilly days, with minimums plummeting to -22°C (-8°F) and maximums reaching a pleasant 23°C (73°F). During this month, you can anticipate about 34 mm (1.3 in) of precipitation spread over 4 days, and the air feels quite humid, with an average humidity level of 83%.

December Temperature in Tarkio

In December in Tarkio, the average temperature is 1°C (34°F). Maximum temperatures can reach 23°C (73°F), while minimums can drop to as low as -22°C (-8°F). It's essential to pack layers and be prepared for a wide range of temperatures while exploring the diverse climate.

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

The chart illustrates December temperature patterns in Tarkio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tarkio, 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 (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec272843526477797570544134
Data source: Temperature data for Tarkio 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 Tarkio

In Tarkio in December, the precipitation amount is 34 mm (1.3 in) over a span of 4 days.

December Precipitation Trends in Tarkio

The chart displays monthly precipitation patterns in Tarkio, 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 Tarkio, December typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec36329377154118105116971423434
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tarkio

In Tarkio 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 Tarkio

This chart illustrates the average monthly humidity levels in Tarkio, 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 Tarkio is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tarkio

In Tarkio 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 Tarkio, you can check the information here.

Maximum UV Index Levels in Tarkio for December

The chart shows the monthly maximum UV Index (UVI) for Tarkio 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 Tarkio typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Tarkio 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 Tarkio Compares to Other Months

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

This table compares monthly weather conditions in Tarkio, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)36 mm (1.4 inches)76%moderate
February Weather-2°C (28°F)32 mm (1.3 inches)80%moderate
March Weather6°C (44°F)93 mm (3.7 inches)73%high
April Weather11°C (52°F)77 mm (3.0 inches)74%very high
May Weather18°C (65°F)154 mm (6.1 inches)78%very high
June Weather25°C (77°F)118 mm (4.6 inches)82%extreme
July Weather26°C (79°F)105 mm (4.1 inches)83%very high
August Weather24°C (76°F)116 mm (4.6 inches)80%very high
September Weather21°C (71°F)97 mm (3.8 inches)75%very high
October Weather12°C (55°F)142 mm (5.6 inches)75%high
November Weather5°C (42°F)34 mm (1.4 inches)82%moderate
December Weather1°C (34°F)34 mm (1.3 inches)83%moderate

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