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December Weather in Willow Creek, United States

Last updated: June 24, 2025

In December, the average temperature in Willow Creek, United States hovers around 5°C (40°F). Expect temperatures to fluctuate between a brisk -6°C (22°F) and a mild 20°C (68°F). This month typically brings about 182 mm (7.2 in) of precipitation over 13 rainy days, contributing to an average humidity of a damp 86%.

December Temperature in Willow Creek

In December in Willow Creek, the average temperature is 5°C (40°F), with maximums reaching up to 20°C (68°F) and minimums dropping as low as -6°C (22°F). This range makes it essential for travelers to pack accordingly, ensuring they are prepared for both mild and chilly conditions.

December Weather in Willow Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Willow Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willow Creek, December typically has an average temperature of 5°C (40°F), with highs reaching up to 20°C (68°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec414144485360656561544640
Data source: Temperature data for Willow Creek 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 Willow Creek

In Willow Creek in December, the precipitation amount is 182 mm (7.2 in) over the course of 13 days.

December Precipitation Trends in Willow Creek

The chart displays monthly precipitation patterns in Willow Creek, 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 Willow Creek, December typically receives around 182 mm (7.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec2432281871216824213470160182
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Willow Creek

In Willow Creek in December humidity is 86%. With an average temperature of 5°C (40°F), this humidity feels like wrapping yourself in a damp blanket—uncomfortably heavy and chilly, making it difficult to enjoy outdoor activities without the constant chill seeping in.

December Average Humidity in Willow Creek

This chart illustrates the average monthly humidity levels in Willow Creek, 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 Willow Creek is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%85%82%81%79%70%60%62%72%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Willow Creek

In Willow Creek in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Willow Creek, you can visit Hourly UV Index in Willow Creek.

Maximum UV Index Levels in Willow Creek for December

The chart shows the monthly maximum UV Index (UVI) for Willow Creek 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 Willow Creek typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478111110109642
Data source: Willow Creek 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 Willow Creek Compares to Other Months

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

This table compares monthly weather conditions in Willow Creek, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)243 mm (9.5 inches)86%moderate
February Weather5°C (42°F)228 mm (9.0 inches)85%moderate
March Weather7°C (44°F)187 mm (7.4 inches)85%high
April Weather9°C (49°F)121 mm (4.8 inches)82%very high
May Weather12°C (54°F)68 mm (2.7 inches)81%extreme
June Weather15°C (60°F)24 mm (1.0 inches)79%extreme
July Weather18°C (65°F)2 mm (0.1 inches)70%very high
August Weather19°C (66°F)1 mm (0.0 inches)60%very high
September Weather16°C (61°F)34 mm (1.3 inches)62%very high
October Weather12°C (54°F)69 mm (2.7 inches)72%high
November Weather8°C (46°F)160 mm (6.3 inches)87%moderate
December Weather5°C (40°F)182 mm (7.2 inches)86%low

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