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December Weather in The Plains, United States

Last updated: June 24, 2025

In December, the average temperature in The Plains, United States hovers around 4°C (39°F). You'll want to be prepared for chilly conditions, as temperatures can dip to a brisk -14°C (8°F), while the mercury can rise to a comfortable 19°C (67°F). Expect 116 mm (4.6 in) of precipitation spread over about 11 days, contributing to an average humidity of 86%. Enjoy your time in this season of contrasts!

December Temperature in The Plains

In December in The Plains, the average temperature is 4°C (39°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -14°C (8°F). Travelers should be prepared for a range of temperatures, making layered clothing essential for comfort during their visit.

December Weather in The Plains: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in The Plains, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In The Plains, December typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (67°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec343845546572777570594439
Data source: Temperature data for The Plains 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 The Plains

In The Plains in December, the precipitation amount is 116 mm (4.6 in) over the course of 11 days.

December Precipitation Trends in The Plains

The chart displays monthly precipitation patterns in The Plains, 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 The Plains, December typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec871231151341351451071229710683116
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in The Plains

In The Plains in December humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.

December Average Humidity in The Plains

This chart illustrates the average monthly humidity levels in The Plains, 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 The Plains is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in The Plains

In The Plains 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 The Plains, you can check the information here.

Maximum UV Index Levels in The Plains for December

The chart shows the monthly maximum UV Index (UVI) for The Plains 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 The Plains typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: The Plains 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 The Plains Compares to Other Months

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

This table compares monthly weather conditions in The Plains, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)87 mm (3.4 inches)88%moderate
February Weather3°C (38°F)123 mm (4.8 inches)88%moderate
March Weather7°C (45°F)115 mm (4.5 inches)88%high
April Weather12°C (54°F)134 mm (5.3 inches)86%very high
May Weather18°C (65°F)135 mm (5.3 inches)82%very high
June Weather22°C (72°F)145 mm (5.7 inches)84%very high
July Weather25°C (77°F)107 mm (4.2 inches)82%very high
August Weather24°C (75°F)122 mm (4.8 inches)73%very high
September Weather21°C (70°F)96 mm (3.8 inches)73%very high
October Weather15°C (59°F)106 mm (4.2 inches)81%high
November Weather7°C (44°F)83 mm (3.3 inches)89%moderate
December Weather4°C (39°F)116 mm (4.6 inches)86%moderate

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