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December Weather in Zillah, United States

Last updated: June 24, 2025

In December, the average temperature in Zillah, United States hovers around 1°C (33°F). Expect a minimum chill of -10°C (14°F) and a pleasant maximum reaching 19°C (67°F). Rainfall during this month is moderate, with 43 mm (1.7 in) spread over 9 days, contributing to an average humidity of 88%. Plan accordingly to enjoy your visit!

December Temperature in Zillah

In December in Zillah, the average temperature is 1°C (33°F). Maximum temperatures can reach 19°C (67°F), while the minimum can drop to as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both cold and mild conditions.

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

The chart illustrates December temperature patterns in Zillah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Zillah, December typically has an average temperature of 1°C (33°F), with highs reaching up to 19°C (67°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec323443526371777766514033
Data source: Temperature data for Zillah 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 Zillah

In Zillah in December, the precipitation amount reaches 43 mm (1.7 in) over the course of 9 days.

December Precipitation Trends in Zillah

The chart displays monthly precipitation patterns in Zillah, 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 Zillah, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec494726221461411313343
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Zillah

In Zillah in December humidity is 88%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill wrapping around you, making it difficult to stay warm while traveling, as each breath carries a heavy, cold moisture that clings to your skin.

December Average Humidity in Zillah

This chart illustrates the average monthly humidity levels in Zillah, 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 Zillah is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%87%84%81%82%79%63%62%83%89%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Zillah

In Zillah 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 Zillah, you can visit Hourly UV Index in Zillah.

Maximum UV Index Levels in Zillah for December

The chart shows the monthly maximum UV Index (UVI) for Zillah 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 Zillah typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23579101097532
Data source: Zillah 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 Zillah Compares to Other Months

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

This table compares monthly weather conditions in Zillah, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)49 mm (1.9 inches)86%low
February Weather1°C (34°F)47 mm (1.8 inches)86%moderate
March Weather6°C (43°F)26 mm (1.0 inches)87%moderate
April Weather11°C (52°F)22 mm (0.9 inches)84%high
May Weather17°C (63°F)14 mm (0.6 inches)81%very high
June Weather21°C (71°F)6 mm (0.2 inches)82%very high
July Weather25°C (78°F)1 mm (0.0 inches)79%very high
August Weather25°C (77°F)4 mm (0.2 inches)63%very high
September Weather19°C (66°F)11 mm (0.4 inches)62%high
October Weather11°C (51°F)31 mm (1.2 inches)83%moderate
November Weather4°C (40°F)33 mm (1.3 inches)89%moderate
December Weather1°C (33°F)43 mm (1.7 inches)88%low

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