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December Weather in Congress, United States

Last updated: June 24, 2025

In December, the average temperature in Congress, United States is a cool 9°C (48°F). During this time, temperatures can fluctuate, with a minimum of -4°C (26°F) and a maximum reaching up to 24°C (75°F). Visitors can expect an average precipitation of 31 mm (1.2 in) over about 4 days, while the air carries a relatively high average humidity of 77%.

December Temperature in Congress

In December in Congress, the average temperature is 9°C (48°F). The maximum can reach 24°C (75°F), and the minimum can be as low as -4°C (26°F). Be prepared for a range of weather, as it can be both pleasantly warm and quite chilly during your travels.

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

The chart illustrates December temperature patterns in Congress, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Congress, December typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec464854647182858478665747
Data source: Temperature data for Congress 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 Congress

In Congress in December, the total precipitation amount is 31 mm (1.2 in) over a span of 4 days.

December Precipitation Trends in Congress

The chart displays monthly precipitation patterns in Congress, 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 Congress, December typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec464746585703427232831
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Congress

In Congress in December, humidity is 77%. With an average temperature of 9°C (48°F), this humidity feels like a damp embrace, making traveling a bit more challenging as the cool air combines with the moisture, often leaving you with a chill that seeps into your bones.

December Average Humidity in Congress

This chart illustrates the average monthly humidity levels in Congress, 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 Congress is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%80%68%58%45%31%27%30%48%60%70%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Congress

In Congress 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 Congress for better planning.

Maximum UV Index Levels in Congress for December

The chart shows the monthly maximum UV Index (UVI) for Congress 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 Congress typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111212121110864
Data source: Congress 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 Congress Compares to Other Months

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

This table compares monthly weather conditions in Congress, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)46 mm (1.8 inches)77%moderate
February Weather9°C (48°F)47 mm (1.8 inches)80%high
March Weather12°C (55°F)46 mm (1.8 inches)68%very high
April Weather18°C (64°F)5 mm (0.2 inches)58%extreme
May Weather22°C (71°F)8 mm (0.3 inches)45%extreme
June Weather28°C (82°F)5 mm (0.2 inches)31%extreme
July Weather29°C (85°F)70 mm (2.8 inches)27%extreme
August Weather29°C (84°F)34 mm (1.3 inches)30%extreme
September Weather26°C (79°F)27 mm (1.0 inches)48%very high
October Weather19°C (66°F)23 mm (0.9 inches)59%very high
November Weather14°C (57°F)28 mm (1.1 inches)70%high
December Weather9°C (48°F)31 mm (1.2 inches)77%moderate

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