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December Weather in Leavenworth, United States

Last updated: June 24, 2025

In December, the average temperature in Leavenworth, United States hovers around 3°C (37°F). Prepare for a chilly range, with the minimum dipping to -19°C (-1°F) and the maximum reaching a comfortable 23°C (73°F). During this time, expect about 35 mm (1.4 in) of precipitation over 3 days, contributing to an average humidity level of 84%.

December Temperature in Leavenworth

In December in Leavenworth, the average temperature is 3°C (37°F), with maximums reaching 23°C (73°F) and minimums dropping as low as -19°C (-1°F). Travelers should be prepared for a wide range of temperatures, from mild days to potentially frigid nights.

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

The chart illustrates December temperature patterns in Leavenworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leavenworth, December typically has an average temperature of 3°C (37°F), with highs reaching up to 23°C (73°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec303246546677807772564437
Data source: Temperature data for Leavenworth 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 Leavenworth

In Leavenworth in December, the precipitation amount is 35 mm (1.4 in) over the course of 3 days.

December Precipitation Trends in Leavenworth

The chart displays monthly precipitation patterns in Leavenworth, 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 Leavenworth, December typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec4833968620311295132811124535
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Leavenworth

In Leavenworth in December humidity is 84%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions brisk and invigorating, yet requiring extra layers to stay comfortable.

December Average Humidity in Leavenworth

This chart illustrates the average monthly humidity levels in Leavenworth, 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 Leavenworth is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Leavenworth

In Leavenworth in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Leavenworth, you can check the information here.

Maximum UV Index Levels in Leavenworth for December

The chart shows the monthly maximum UV Index (UVI) for Leavenworth 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 Leavenworth typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Leavenworth 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 Leavenworth Compares to Other Months

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

This table compares monthly weather conditions in Leavenworth, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)48 mm (1.9 inches)76%moderate
February Weather0°C (32°F)33 mm (1.3 inches)77%moderate
March Weather8°C (46°F)95 mm (3.8 inches)70%high
April Weather12°C (54°F)85 mm (3.4 inches)73%very high
May Weather19°C (66°F)203 mm (8.0 inches)82%very high
June Weather25°C (77°F)112 mm (4.4 inches)82%extreme
July Weather26°C (80°F)94 mm (3.7 inches)81%extreme
August Weather25°C (77°F)132 mm (5.2 inches)78%very high
September Weather22°C (72°F)81 mm (3.2 inches)71%very high
October Weather14°C (57°F)112 mm (4.4 inches)71%high
November Weather6°C (44°F)45 mm (1.8 inches)81%moderate
December Weather3°C (37°F)35 mm (1.4 inches)84%moderate

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