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December Weather in Cascade, United States

Last updated: June 24, 2025

In December, the average temperature in Cascade, United States hovers around -3°C (28°F), making it a brisk time of year. Temperatures can plunge as low as -28°C (-18°F) or reach up to 17°C (63°F). Expect a total precipitation of about 27 mm (1.1 in), spread over 7 days, and be prepared for the chill with an average humidity of 90%.

December Temperature in Cascade

In December in Cascade, the average temperature is -3°C (28°F), with maximums reaching up to 17°C (63°F) and minimums dropping as low as -28°C (-18°F). This wide temperature range suggests that travelers should pack accordingly to enjoy their visit comfortably.

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 -3°C (28°F), with highs reaching up to 17°C (63°F) and lows dropping to around -28°C (-18°F).
JanFebMarAprMayJunJulAugSepOctNovDec241933405261706858433527
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 precipitation amount is 27 mm (1.1 in) accumulated over 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 27 mm (1.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec164029648196152741403027
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 90%. With an average temperature of -3°C (28°F), this humidity feels like an icy fog wrapping around you, making outdoor activities uncomfortable and potentially dangerous for traveling.

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 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
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-4°C (25°F)16 mm (0.6 inches)87%low
February Weather-7°C (19°F)40 mm (1.6 inches)88%moderate
March Weather0°C (33°F)29 mm (1.1 inches)83%moderate
April Weather5°C (41°F)64 mm (2.5 inches)78%very high
May Weather11°C (52°F)81 mm (3.2 inches)76%very high
June Weather16°C (62°F)96 mm (3.8 inches)78%very high
July Weather21°C (70°F)15 mm (0.6 inches)77%very high
August Weather20°C (68°F)27 mm (1.1 inches)71%very high
September Weather14°C (58°F)41 mm (1.6 inches)68%high
October Weather6°C (43°F)40 mm (1.6 inches)72%moderate
November Weather1°C (35°F)30 mm (1.2 inches)84%moderate
December Weather-3°C (28°F)27 mm (1.1 inches)90%low

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