December Weather in Bay, United States

Last updated: June 24, 2025

In December, the average temperature in Bay, United States hovers around 7°C (46°F). Expect a range with minimums dipping down to -11°C (13°F) and maximums soaring up to 25°C (77°F). During this month, you may encounter about 119 mm (4.7 in) of precipitation spread across 9 days, accompanied by a high average humidity of 88%.

December Temperature in Bay

In December in Bay, the average temperature is 7°C (46°F). Maximum temperatures can reach 25°C (77°F), while minimums can drop as low as -11°C (13°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

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

The chart illustrates December temperature patterns in Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bay, December typically has an average temperature of 7°C (46°F), with highs reaching up to 25°C (77°F) and lows dropping to around -11°C (13°F).

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

December Precipitation in Bay

In Bay in December, the precipitation amount is 119 mm (4.7 in) occurring over a span of 9 days.

December Precipitation Trends in Bay

The chart displays monthly precipitation patterns in Bay, 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 Bay, December typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 9 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 Bay

In Bay in December humidity is 88%. With an average temperature of 7°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring you to dress in layers to stay warm and dry while exploring.

December Average Humidity in Bay

This chart illustrates the average monthly humidity levels in Bay, 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 Bay is approximately 88%, 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 Bay

In Bay 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 Bay, you can check the information here.

Maximum UV Index Levels in Bay for December

The chart shows the monthly maximum UV Index (UVI) for Bay 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 Bay typically reaches 3, which falls under the moderate exposure category.

Data source: Bay 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 Bay Compares to Other Months

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

This table compares monthly weather conditions in Bay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	99 mm (3.9 inches)	84%	moderate
February Weather	6°C (44°F)	170 mm (6.7 inches)	83%	high
March Weather	12°C (54°F)	169 mm (6.7 inches)	81%	high
April Weather	15°C (60°F)	140 mm (5.5 inches)	81%	very high
May Weather	22°C (71°F)	133 mm (5.2 inches)	83%	extreme
June Weather	26°C (78°F)	102 mm (4.0 inches)	83%	extreme
July Weather	28°C (82°F)	97 mm (3.8 inches)	81%	extreme
August Weather	26°C (79°F)	112 mm (4.4 inches)	74%	very high
September Weather	24°C (75°F)	90 mm (3.5 inches)	71%	very high
October Weather	17°C (64°F)	125 mm (4.9 inches)	76%	high
November Weather	10°C (50°F)	82 mm (3.2 inches)	84%	moderate
December Weather	7°C (46°F)	119 mm (4.7 inches)	88%	moderate