December Weather in Cascade, United States

Last updated: June 24, 2025

In December, the average temperature in Cascade, United States hovers around -1°C (30°F). However, temperatures can vary widely, with a minimum of -22°C (-7°F) and a maximum reaching up to 21°C (70°F). Expect 44 mm (1.7 in) of precipitation over approximately 6 days, accompanied by an average humidity level of 82%. Stay prepared for chilly days with the potential for warmer breezes!

December Temperature in Cascade

In December in Cascade, the average temperature is -1°C (30°F), with maximums reaching 21°C (70°F) and minimums plummeting to -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, from chilly to surprisingly warm, making it essential to pack accordingly.

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 21°C (70°F) and lows dropping to around -22°C (-7°F).

Data source: Temperature data for Cascade generated using information from the Copernicus Climate Change Service.

December Precipitation in Cascade

In Cascade in December, the total precipitation amount is 44 mm (1.7 in) spread over 6 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 44 mm (1.7 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Cascade

In Cascade in December, humidity is 82%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that penetrates your clothing, making travel uncomfortable and dampening your spirit as you navigate through the cold, moisture-laden air.

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 82%, offering insight into how humid the weather typically is during this month.

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 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 Cascade, you can check the information here.

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 3, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	49 mm (1.9 inches)	84%	moderate
February Weather	-5°C (23°F)	60 mm (2.4 inches)	85%	moderate
March Weather	3°C (37°F)	67 mm (2.6 inches)	84%	moderate
April Weather	8°C (47°F)	84 mm (3.3 inches)	83%	very high
May Weather	16°C (61°F)	155 mm (6.1 inches)	75%	very high
June Weather	22°C (72°F)	124 mm (4.9 inches)	79%	extreme
July Weather	24°C (75°F)	85 mm (3.3 inches)	75%	very high
August Weather	22°C (72°F)	89 mm (3.5 inches)	69%	very high
September Weather	19°C (66°F)	123 mm (4.8 inches)	74%	very high
October Weather	11°C (52°F)	126 mm (5.0 inches)	79%	moderate
November Weather	3°C (37°F)	49 mm (1.9 inches)	88%	moderate
December Weather	-1°C (30°F)	44 mm (1.7 inches)	82%	moderate