December Weather in Vernonia, United States

Last updated: June 24, 2025

In Vernonia, United States, the average temperature in December hovers around 4°C (39°F), with the minimum dipping to a chilly -7°C (20°F) and the maximum reaching a mild 13°C (56°F). Expect considerable precipitation, with about 206 mm (8.1 in) falling over 20 days, contributing to an average humidity level of 87%.

December Temperature in Vernonia

In December in Vernonia, the average temperature is 4°C (39°F). The maximum can reach 13°C (56°F), while the minimum can drop as low as -7°C (20°F). Travelers should prepare for chilly weather and pack accordingly for both mild and cold conditions.

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

The chart illustrates December temperature patterns in Vernonia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vernonia, December typically has an average temperature of 4°C (39°F), with highs reaching up to 13°C (56°F) and lows dropping to around -7°C (20°F).

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

December Precipitation in Vernonia

In Vernonia in December, the precipitation amount is 206 mm (8.1 in) over a period of 20 days.

December Precipitation Trends in Vernonia

The chart displays monthly precipitation patterns in Vernonia, 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 Vernonia, December typically receives around 206 mm (8.1 inches) of precipitation spread over approximately 20 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 Vernonia

In Vernonia in December, humidity is 87%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and gritty, as the air hangs heavy and clings to your skin.

December Average Humidity in Vernonia

This chart illustrates the average monthly humidity levels in Vernonia, 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 Vernonia is approximately 87%, 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 Vernonia

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

Maximum UV Index Levels in Vernonia for December

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

Data source: Vernonia 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 Vernonia Compares to Other Months

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

This table compares monthly weather conditions in Vernonia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	194 mm (7.6 inches)	85%	low
February Weather	4°C (39°F)	180 mm (7.1 inches)	84%	moderate
March Weather	6°C (43°F)	152 mm (6.0 inches)	85%	moderate
April Weather	9°C (48°F)	132 mm (5.2 inches)	83%	high
May Weather	12°C (54°F)	72 mm (2.9 inches)	83%	very high
June Weather	15°C (59°F)	62 mm (2.5 inches)	83%	very high
July Weather	17°C (63°F)	10 mm (0.4 inches)	82%	very high
August Weather	18°C (65°F)	10 mm (0.4 inches)	74%	very high
September Weather	16°C (60°F)	79 mm (3.1 inches)	71%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	81%	moderate
November Weather	7°C (44°F)	176 mm (6.9 inches)	87%	moderate
December Weather	4°C (39°F)	206 mm (8.1 inches)	87%	low