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December Weather in Cascade, United States

Last updated: June 24, 2025

In Cascade, United States, the average temperature in December hovers around -1°C (30°F). Expect chilly conditions with minimum temperatures plunging to -24°C (-11°F) and a warming maximum reaching 18°C (64°F). During this month, precipitation amounts average 48 mm (1.9 in) over 7 days, accompanied by a notable average humidity of 81%. Prepare for a blend of cold and wet weather!

December Temperature in Cascade

In December in Cascade, the average temperature is -1°C (30°F). Maximum temperatures can reach 18°C (64°F), while the minimum can drop as low as -24°C (-11°F). It's essential to pack layers and prepare for a wide range of weather if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Cascade, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cascade, December typically has an average temperature of -1°C (30°F), with highs reaching up to 18°C (64°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec222234435667737064513729
Data source: Temperature data for Cascade 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 Cascade

In Cascade in December, the total precipitation amount is 48 mm (1.9 in) over a span of 7 days.

December Precipitation Trends in Cascade

The chart displays monthly precipitation patterns in Cascade, 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 Cascade, December typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec48475710411610210889821074448
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cascade

In Cascade in December, humidity is 81%. With an average temperature of -1°C (30°F), this humidity feels like an extra layer of chill settles in, making travel uncomfortable and the cold air cling to your skin, dampening the experience with every breath.

December Average Humidity in Cascade

This chart illustrates the average monthly humidity levels in Cascade, 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 Cascade is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cascade

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

Maximum UV Index Levels in Cascade for December

The chart shows the monthly maximum UV Index (UVI) for Cascade 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 Cascade typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Cascade 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 Cascade Compares to Other Months

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

This table compares monthly weather conditions in Cascade, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)48 mm (1.9 inches)85%low
February Weather-5°C (23°F)47 mm (1.9 inches)85%moderate
March Weather1°C (34°F)57 mm (2.3 inches)85%moderate
April Weather6°C (43°F)104 mm (4.1 inches)85%very high
May Weather13°C (56°F)116 mm (4.6 inches)78%very high
June Weather19°C (67°F)102 mm (4.0 inches)80%very high
July Weather23°C (73°F)108 mm (4.3 inches)78%very high
August Weather21°C (71°F)89 mm (3.5 inches)76%very high
September Weather18°C (64°F)82 mm (3.2 inches)79%high
October Weather11°C (51°F)107 mm (4.2 inches)83%moderate
November Weather3°C (37°F)44 mm (1.7 inches)88%moderate
December Weather-1°C (30°F)48 mm (1.9 inches)81%low

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