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December Weather in Ritzville, United States

Last updated: June 24, 2025

In December, the average temperature in Ritzville, United States hovers around 1°C (33°F). Expect chilly conditions, with minimums dipping to -14°C (8°F) and maximums reaching 16°C (61°F). It's also a relatively wet month, with 43 mm (1.7 in) of precipitation spread across 9 days, and the air can feel quite humid, averaging 86%.

December Temperature in Ritzville

In December in Ritzville, the average temperature is 1°C (33°F), with maximums reaching up to 16°C (61°F) and minimums dropping as low as -14°C (8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both mild and chilly conditions.

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

The chart illustrates December temperature patterns in Ritzville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ritzville, December typically has an average temperature of 1°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec333343516270787765504033
Data source: Temperature data for Ritzville 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 Ritzville

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

December Precipitation Trends in Ritzville

The chart displays monthly precipitation patterns in Ritzville, 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 Ritzville, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec5143413324131717385143
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ritzville

In Ritzville in December humidity is 86%. With average temperature 1°C (33°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers for warmth to counteract the dampness in the air.

December Average Humidity in Ritzville

This chart illustrates the average monthly humidity levels in Ritzville, 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 Ritzville 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 Ritzville

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

Maximum UV Index Levels in Ritzville for December

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

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

This table compares monthly weather conditions in Ritzville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)51 mm (2.0 inches)85%low
February Weather0°C (33°F)43 mm (1.7 inches)86%moderate
March Weather6°C (43°F)41 mm (1.6 inches)86%moderate
April Weather10°C (51°F)33 mm (1.3 inches)82%high
May Weather17°C (62°F)24 mm (1.0 inches)77%very high
June Weather21°C (70°F)12 mm (0.5 inches)79%very high
July Weather26°C (78°F)1 mm (0.1 inches)77%very high
August Weather25°C (77°F)7 mm (0.3 inches)62%very high
September Weather19°C (66°F)17 mm (0.7 inches)60%high
October Weather10°C (50°F)38 mm (1.5 inches)80%moderate
November Weather4°C (40°F)51 mm (2.0 inches)87%moderate
December Weather1°C (33°F)43 mm (1.7 inches)86%low

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