December Weather in Omiya, Japan

Last updated: August 23, 2025

In December, the average temperature in Omiya, Japan is a brisk 7°C (45°F). Expect chilly nights with minimums dipping to -1°C (30°F), while daytime highs can reach a pleasant 18°C (65°F). Be prepared for some rain, as the area experiences about 63 mm (2.5 in) of precipitation over 7 days. With an average humidity of 77%, layering is key to staying comfortable throughout your visit!

December Temperature in Omiya

In December in Omiya, the average temperature is 7°C (45°F). Maximums can reach 18°C (65°F), and minimums can be as low as -1°C (30°F). It's a great time for travelers to enjoy the crisp weather while exploring the area, but be sure to pack layers to stay comfortable throughout the day.

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

The chart illustrates December temperature patterns in Omiya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omiya, December typically has an average temperature of 7°C (45°F), with highs reaching up to 18°C (65°F) and lows dropping to around -1°C (30°F).

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

December Precipitation in Omiya

In Omiya in December, the precipitation amount is 63 mm (2.5 in) over a span of 7 days.

December Precipitation Trends in Omiya

The chart displays monthly precipitation patterns in Omiya, 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 Omiya, December typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Omiya

In Omiya in December, humidity is 77%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making it important to dress in layers for comfort while exploring the area.

December Average Humidity in Omiya

This chart illustrates the average monthly humidity levels in Omiya, 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 Omiya is approximately 77%, 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 Omiya

In Omiya 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 Omiya, you can check the information here.

Maximum UV Index Levels in Omiya for December

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

Data source: Omiya 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 Omiya Compares to Other Months

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

This table compares monthly weather conditions in Omiya, 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 (40°F)	48 mm (1.9 inches)	76%	moderate
February Weather	5°C (42°F)	42 mm (1.6 inches)	75%	moderate
March Weather	9°C (48°F)	148 mm (5.8 inches)	72%	high
April Weather	12°C (55°F)	126 mm (5.0 inches)	73%	very high
May Weather	18°C (64°F)	137 mm (5.4 inches)	80%	very high
June Weather	21°C (70°F)	140 mm (5.5 inches)	87%	extreme
July Weather	24°C (76°F)	215 mm (8.4 inches)	92%	extreme
August Weather	26°C (80°F)	138 mm (5.4 inches)	90%	very high
September Weather	23°C (73°F)	176 mm (6.9 inches)	84%	very high
October Weather	18°C (64°F)	239 mm (9.4 inches)	80%	high
November Weather	13°C (55°F)	80 mm (3.2 inches)	77%	moderate
December Weather	7°C (45°F)	63 mm (2.5 inches)	77%	moderate