December Weather in Granite Falls, United States

Last updated: June 24, 2025

In Granite Falls, United States, the average temperature in December hovers around -5°C (24°F), with a notable range where the minimum can drop to -25°C (-12°F) and the maximum reaches up to 14°C (57°F). This month typically brings about 39 mm (1.6 in) of precipitation spread over 5 days, while the average humidity sits at a brisk 84%.

December Temperature in Granite Falls

In December in Granite Falls, the average temperature is -5°C (24°F). Maximums can reach 14°C (57°F), while minimums can drop as low as -25°C (-12°F). This wide temperature range suggests that travelers should prepare for cold conditions but may also enjoy occasional milder days.

December Weather in Granite Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Granite Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Granite Falls, December typically has an average temperature of -5°C (24°F), with highs reaching up to 14°C (57°F) and lows dropping to around -25°C (-12°F).

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

December Precipitation in Granite Falls

In Granite Falls in December, the precipitation amount is 39 mm (1.6 in) over a period of 5 days.

December Precipitation Trends in Granite Falls

The chart displays monthly precipitation patterns in Granite Falls, 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 Granite Falls, December typically receives around 39 mm (1.6 inches) of precipitation spread over approximately 5 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 Granite Falls

In Granite Falls in December, humidity is 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.

December Average Humidity in Granite Falls

This chart illustrates the average monthly humidity levels in Granite Falls, 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 Granite Falls is approximately 84%, 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 Granite Falls

In Granite Falls 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 Granite Falls, you can visit Hourly UV Index in Granite Falls.

Maximum UV Index Levels in Granite Falls for December

The chart shows the monthly maximum UV Index (UVI) for Granite Falls 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 Granite Falls typically reaches 2, which falls under the low exposure category.

Data source: Granite Falls 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 Granite Falls Compares to Other Months

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

This table compares monthly weather conditions in Granite Falls, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	21 mm (0.8 inches)	85%	moderate
February Weather	-9°C (16°F)	23 mm (0.9 inches)	89%	moderate
March Weather	0°C (33°F)	57 mm (2.3 inches)	81%	moderate
April Weather	6°C (43°F)	76 mm (3.0 inches)	82%	high
May Weather	15°C (59°F)	110 mm (4.3 inches)	76%	very high
June Weather	22°C (72°F)	86 mm (3.4 inches)	81%	very high
July Weather	23°C (74°F)	108 mm (4.3 inches)	82%	very high
August Weather	21°C (71°F)	125 mm (4.9 inches)	83%	very high
September Weather	18°C (65°F)	107 mm (4.2 inches)	82%	high
October Weather	9°C (48°F)	93 mm (3.7 inches)	82%	moderate
November Weather	1°C (34°F)	27 mm (1.1 inches)	87%	moderate
December Weather	-5°C (24°F)	39 mm (1.6 inches)	84%	low