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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 -5°C (23°F). Expect chilly conditions with minimums dropping to -26°C (-15°F) and occasional highs of 9°C (49°F). Precipitation is significant this month, totaling 109 mm (4.3 in) spread over 15 days, while the air remains quite humid, with an average humidity level of 89%.

December Temperature in Cascade

In December in Cascade, the average temperature is -5°C (23°F). Maximums can reach 9°C (49°F) while minimums can drop as low as -26°C (-15°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both cold and milder conditions.

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 -5°C (23°F), with highs reaching up to 9°C (49°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec242432374556666555403023
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 109 mm (4.3 in) spread over 15 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 109 mm (4.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec1191631159785669224371101109
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 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%91%88%84%77%78%78%63%60%77%86%90%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111108642
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-5°C (24°F)119 mm (4.7 inches)90%moderate
February Weather-4°C (24°F)163 mm (6.4 inches)91%moderate
March Weather0°C (32°F)114 mm (4.5 inches)88%high
April Weather3°C (37°F)97 mm (3.8 inches)84%very high
May Weather7°C (45°F)85 mm (3.4 inches)77%very high
June Weather13°C (56°F)65 mm (2.6 inches)78%extreme
July Weather19°C (67°F)9 mm (0.3 inches)77%extreme
August Weather18°C (65°F)21 mm (0.8 inches)63%very high
September Weather13°C (55°F)43 mm (1.7 inches)60%very high
October Weather4°C (40°F)71 mm (2.8 inches)77%high
November Weather-1°C (30°F)101 mm (4.0 inches)86%moderate
December Weather-5°C (23°F)109 mm (4.3 inches)89%low

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