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December Weather in Plains, United States

Last updated: June 24, 2025

In Plains, United States, the average temperature in December hovers around 7°C (45°F). Be prepared for a temperature range that can dip to a chilly -8°C (17°F) and rise to a warm 26°C (78°F). On average, expect about 11 mm (0.4 in) of precipitation spread over 1 day, with 80% humidity adding a touch of dampness to the air.

December Temperature in Plains

In December in Plains, the average temperature is 7°C (45°F), with maximums reaching 26°C (78°F) and minimums dropping as low as -8°C (17°F). Travelers should be prepared for a wide range of temperatures during their visit.

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 7°C (45°F), with highs reaching up to 26°C (78°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec414555627279818073615145
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 11 mm (0.4 in) over the course of one day.

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 11 mm (0.4 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec181134174146243944461811
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 80%. With an average temperature of 7°C (45°F), this humidity feels like you're wrapped in a damp blanket, making it quite uncomfortable for traveling and leaving you feeling chilly and clammy as you explore the area.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%75%61%61%67%69%69%66%71%71%82%80%
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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Plains for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121210864
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 Weather5°C (42°F)18 mm (0.7 inches)75%moderate
February Weather7°C (45°F)11 mm (0.4 inches)74%high
March Weather13°C (55°F)34 mm (1.3 inches)61%very high
April Weather17°C (62°F)17 mm (0.7 inches)61%extreme
May Weather22°C (72°F)41 mm (1.6 inches)67%extreme
June Weather26°C (79°F)46 mm (1.8 inches)69%extreme
July Weather27°C (81°F)24 mm (0.9 inches)69%extreme
August Weather27°C (80°F)39 mm (1.5 inches)66%extreme
September Weather23°C (74°F)44 mm (1.7 inches)71%very high
October Weather16°C (62°F)46 mm (1.8 inches)71%very high
November Weather11°C (51°F)18 mm (0.7 inches)82%high
December Weather7°C (45°F)11 mm (0.4 inches)80%moderate

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