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December Weather in Ballard, United States

Last updated: June 24, 2025

In December, the average temperature in Ballard, United States hovers around -2°C (29°F). It can dip as low as -17°C (2°F), while highs can reach up to 16°C (61°F). Expect about 23 mm (0.9 in) of precipitation spread over 6 days, accompanied by an average humidity of 88%.

December Temperature in Ballard

In December in Ballard, the average temperature is -2°C (29°F), with maximums reaching 16°C (61°F) and minimums dropping to as low as -17°C (2°F). It's advisable to pack warm clothing and prepare for a wide range of temperatures if you plan to visit during this time.

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

The chart illustrates December temperature patterns in Ballard, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ballard, December typically has an average temperature of -2°C (29°F), with highs reaching up to 16°C (61°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec253041506073807767493928
Data source: Temperature data for Ballard 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 Ballard

In Ballard in December, the precipitation amount is 23 mm (0.9 in) spread over 6 days.

December Precipitation Trends in Ballard

The chart displays monthly precipitation patterns in Ballard, 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 Ballard, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec252936202512111418311823
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ballard

In Ballard in December, humidity is 88%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill in the air that penetrates layers of clothing, making outdoor activities challenging and potentially uncomfortable for travelers.

December Average Humidity in Ballard

This chart illustrates the average monthly humidity levels in Ballard, 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 Ballard is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ballard

In Ballard 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 Ballard, you can check the information here.

Maximum UV Index Levels in Ballard for December

The chart shows the monthly maximum UV Index (UVI) for Ballard 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 Ballard typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
Data source: Ballard 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 Ballard Compares to Other Months

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

This table compares monthly weather conditions in Ballard, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)25 mm (1.0 inches)91%moderate
February Weather-1°C (30°F)29 mm (1.1 inches)92%high
March Weather5°C (42°F)36 mm (1.4 inches)84%very high
April Weather10°C (51°F)20 mm (0.8 inches)74%very high
May Weather16°C (61°F)25 mm (1.0 inches)62%extreme
June Weather23°C (73°F)12 mm (0.5 inches)56%extreme
July Weather27°C (80°F)11 mm (0.4 inches)44%extreme
August Weather25°C (77°F)14 mm (0.6 inches)37%extreme
September Weather20°C (67°F)18 mm (0.7 inches)46%very high
October Weather9°C (49°F)31 mm (1.2 inches)67%high
November Weather4°C (39°F)18 mm (0.7 inches)84%moderate
December Weather-2°C (29°F)23 mm (0.9 inches)88%moderate

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