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December Weather in Spokane, United States

Last updated: June 24, 2025

In December, the average temperature in Spokane, United States hovers around 0°C (32°F), with a minimum dipping to -20°C (-3°F) and a maximum reaching 16°C (61°F). Expect 74 mm (2.9 in) of precipitation spread over 13 days, contributing to a high average humidity of 86%.

December Temperature in Spokane

In December in Spokane, the average temperature is 0°C (32°F). Maximum can reach 16°C (61°F) and minimum can be as low as -20°C (-3°F). Be prepared for a wide range of temperatures and pack accordingly if you're planning to travel during this month.

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

The chart illustrates December temperature patterns in Spokane, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spokane, December typically has an average temperature of 0°C (32°F), with highs reaching up to 16°C (61°F) and lows dropping to around -20°C (-3°F).
JanFebMarAprMayJunJulAugSepOctNovDec303039475866747362473831
Data source: Temperature data for Spokane 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 Spokane

In Spokane in December, the precipitation amount is 74 mm (2.9 in) over the course of 13 days.

December Precipitation Trends in Spokane

The chart displays monthly precipitation patterns in Spokane, 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 Spokane, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec76656052502141231557974
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Spokane

In Spokane in December humidity is 86%. With an average temperature of 0°C (32°F), this humidity feels like a biting chill that seeps into your bones, making travel feel uncomfortable and damp, as the cold air combines with the moisture to create a brisk sensation that may deter outdoor exploration.

December Average Humidity in Spokane

This chart illustrates the average monthly humidity levels in Spokane, 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 Spokane is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Spokane

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

Maximum UV Index Levels in Spokane for December

The chart shows the monthly maximum UV Index (UVI) for Spokane 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 Spokane typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2456891097532
Data source: Spokane 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 Spokane Compares to Other Months

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

This table compares monthly weather conditions in Spokane, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)76 mm (3.0 inches)85%low
February Weather-1°C (30°F)65 mm (2.6 inches)86%moderate
March Weather4°C (40°F)60 mm (2.4 inches)86%moderate
April Weather8°C (47°F)52 mm (2.1 inches)82%high
May Weather14°C (58°F)50 mm (2.0 inches)77%very high
June Weather19°C (66°F)21 mm (0.8 inches)79%very high
July Weather23°C (75°F)4 mm (0.1 inches)77%very high
August Weather23°C (73°F)11 mm (0.5 inches)62%very high
September Weather17°C (62°F)30 mm (1.2 inches)60%high
October Weather8°C (47°F)55 mm (2.2 inches)80%moderate
November Weather3°C (38°F)79 mm (3.1 inches)87%moderate
December Weather0°C (32°F)74 mm (2.9 inches)86%low

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