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December Weather in Walla Walla East, United States

Last updated: June 24, 2025

The average temperature in Walla Walla East, United States during December hovers around 1°C (34°F). Expect a chilly range with minimums dropping to -14°C (6°F) and maximums reaching up to 18°C (65°F). This month also sees precipitation totaling 93 mm (3.7 in) over about 15 days, with an average humidity level of 87%.

December Temperature in Walla Walla East

In December, in Walla Walla East, the average temperature is 1°C (34°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -14°C (6°F). Be prepared for a wide range of temperatures and pack accordingly if you plan to visit during this time.

December Weather in Walla Walla East: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Walla Walla East, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walla Walla East, December typically has an average temperature of 1°C (34°F), with highs reaching up to 18°C (65°F) and lows dropping to around -14°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec343441485765737262494134
Data source: Temperature data for Walla Walla East 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 Walla Walla East

In Walla Walla East in December, the precipitation amount is 93 mm (3.7 in) over the course of 15 days.

December Precipitation Trends in Walla Walla East

The chart displays monthly precipitation patterns in Walla Walla East, 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 Walla Walla East, December typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec77125756248273825628493
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Walla Walla East

In Walla Walla East in December humidity is 87%. With an average temperature of 1°C (34°F), this humidity feels like a chilling blanket enveloping you, making every step outside feel heavy and damp, and leaving you longing for warmth and comfort while traveling.

December Average Humidity in Walla Walla East

This chart illustrates the average monthly humidity levels in Walla Walla East, 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 Walla Walla East is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%85%83%77%81%77%60%58%75%85%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Walla Walla East

In Walla Walla East 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 Walla Walla East, you can visit Hourly UV Index in Walla Walla East.

Maximum UV Index Levels in Walla Walla East for December

The chart shows the monthly maximum UV Index (UVI) for Walla Walla East 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 Walla Walla East typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Walla Walla East 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 Walla Walla East Compares to Other Months

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

This table compares monthly weather conditions in Walla Walla East, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)77 mm (3.0 inches)86%low
February Weather1°C (34°F)125 mm (4.9 inches)86%moderate
March Weather5°C (41°F)75 mm (3.0 inches)85%high
April Weather9°C (48°F)62 mm (2.4 inches)83%high
May Weather14°C (57°F)48 mm (1.9 inches)77%very high
June Weather18°C (65°F)27 mm (1.1 inches)81%very high
July Weather23°C (74°F)2 mm (0.1 inches)76%very high
August Weather22°C (72°F)8 mm (0.3 inches)60%very high
September Weather17°C (62°F)25 mm (1.0 inches)58%high
October Weather9°C (49°F)62 mm (2.4 inches)75%moderate
November Weather5°C (41°F)84 mm (3.3 inches)85%moderate
December Weather1°C (34°F)93 mm (3.7 inches)87%low

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