January Weather in Omiya, Japan

Last updated: August 23, 2025

In January, the average temperature in Omiya, Japan hovers around 5°C (40°F), with a minimum dipping to -4°C (26°F) and a maximum peaking at 15°C (59°F). Expect 48 mm (1.9 in) of precipitation spread over 5 days, contributing to an average humidity level of 76%. Stay prepared for a mix of chilly and wet conditions!

January Temperature in Omiya

In January in Omiya, the average temperature is 5°C (40°F). Maximum temperatures can reach 15°C (59°F), while minimum temperatures can plummet to as low as -4°C (26°F). Be sure to pack layers to stay comfortable while exploring the area!

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

The chart illustrates January 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, January typically has an average temperature of 5°C (40°F), with highs reaching up to 15°C (59°F) and lows dropping to around -4°C (26°F).

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

January Precipitation in Omiya

In Omiya in January, the precipitation amount is 48 mm (1.9 in) spread over the course of 5 days.

January Precipitation Trends in Omiya

The chart displays monthly precipitation patterns in Omiya, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Omiya, January typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Omiya

In Omiya in January, humidity is 76%. With an average temperature of 5°C (40°F), this humidity feels like an unwelcome chill that clings to your skin, making it difficult to fully enjoy your travels.

January Average Humidity in Omiya

This chart illustrates the average monthly humidity levels in Omiya, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Omiya is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Omiya

In Omiya in January, 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 January

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

Data source: Omiya January 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 January 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 January’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 January’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