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December Weather in Plains, United States

Last updated: June 24, 2025

In December, the average temperature in Plains, United States hovers around 3°C (38°F). Expect a minimum as low as -14°C (7°F) and a maximum peaking at 25°C (77°F). The month brings about 26 mm (1.0 in) of precipitation over approximately 2 days, while the average humidity remains high at 83%.

December Temperature in Plains

In December in Plains, the average temperature is 3°C (38°F). Maximums can reach 25°C (77°F), while minimums can drop as low as -14°C (7°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates December temperature patterns in Plains, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plains, December typically has an average temperature of 3°C (38°F), with highs reaching up to 25°C (77°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec343548556576807873574638
Data source: Temperature data for 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 Plains

In Plains in December, the precipitation amount is 26 mm (1.0 in) over the course of 2 days.

December Precipitation Trends in Plains

The chart displays monthly precipitation patterns in 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 Plains, December typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec1913634411153435337571026
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Plains

In Plains in December humidity is 83%. With an average temperature of 3°C (38°F), this humidity feels like a cold, damp embrace that chills you to the bone, making outdoor activities feel brisk and uncomfortable for traveling.

December Average Humidity in Plains

This chart illustrates the average monthly humidity levels in 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 Plains is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%77%65%67%81%82%82%84%79%75%79%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Plains

In 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 Plains, you can check the information here.

Maximum UV Index Levels in Plains for December

The chart shows the monthly maximum UV Index (UVI) for 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 Plains typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111211119753
Data source: 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 Plains Compares to Other Months

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

This table compares monthly weather conditions in Plains, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)19 mm (0.8 inches)74%moderate
February Weather2°C (35°F)13 mm (0.5 inches)77%high
March Weather9°C (48°F)63 mm (2.5 inches)65%high
April Weather13°C (55°F)43 mm (1.7 inches)67%very high
May Weather18°C (65°F)111 mm (4.4 inches)81%extreme
June Weather25°C (77°F)53 mm (2.1 inches)82%extreme
July Weather27°C (80°F)43 mm (1.7 inches)82%extreme
August Weather25°C (78°F)53 mm (2.1 inches)84%extreme
September Weather23°C (73°F)37 mm (1.5 inches)79%very high
October Weather14°C (57°F)57 mm (2.2 inches)75%high
November Weather8°C (46°F)10 mm (0.4 inches)79%moderate
December Weather3°C (38°F)26 mm (1.0 inches)83%moderate

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