January Weather in Ono-hara, Japan

Last updated: August 23, 2025

In January, the average temperature in Ono-hara, Japan hovers around 5°C (42°F). You can expect chilly days, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 15°C (59°F). During this time, precipitation averages 49 mm (1.9 in) over about 6 days, and the air remains fairly damp with an average humidity of 76%. Prepare for a cool and wet month!

January Temperature in Ono-hara

In January in Ono-hara, the average temperature is 5°C (42°F). Maximums can reach 15°C (59°F) and minimums can be as low as -4°C (25°F). Be sure to pack layers to stay comfortable during your travels!

January Weather in Ono-hara: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Ono-hara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ono-hara, January typically has an average temperature of 5°C (42°F), with highs reaching up to 15°C (59°F) and lows dropping to around -4°C (25°F).

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

January Precipitation in Ono-hara

In Ono-hara in January, the precipitation amount is 49 mm (1.9 in) over the course of 6 days.

January Precipitation Trends in Ono-hara

The chart displays monthly precipitation patterns in Ono-hara, 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 Ono-hara, January typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 6 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 Ono-hara

In Ono-hara in January humidity is 76%. With an average temperature of 5°C (42°F), this humidity feels like a chilling blanket enveloping you, making travel quite uncomfortable as the dampness seeps into your clothes and lingers on your skin.

January Average Humidity in Ono-hara

This chart illustrates the average monthly humidity levels in Ono-hara, 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 Ono-hara 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 Ono-hara

In Ono-hara in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Ono-hara for better planning.

Maximum UV Index Levels in Ono-hara for January

The chart shows the monthly maximum UV Index (UVI) for Ono-hara 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 Ono-hara typically reaches 4, which falls under the moderate exposure category.

Data source: Ono-hara 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 Ono-hara Compares to Other Months

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

This table compares monthly weather conditions in Ono-hara, 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 (42°F)	49 mm (1.9 inches)	76%	moderate
February Weather	6°C (43°F)	69 mm (2.7 inches)	72%	moderate
March Weather	10°C (50°F)	125 mm (4.9 inches)	69%	very high
April Weather	14°C (58°F)	137 mm (5.4 inches)	75%	extreme
May Weather	19°C (66°F)	136 mm (5.4 inches)	84%	extreme
June Weather	22°C (72°F)	181 mm (7.1 inches)	88%	extreme
July Weather	26°C (79°F)	386 mm (15.2 inches)	95%	extreme
August Weather	28°C (82°F)	256 mm (10.1 inches)	93%	extreme
September Weather	24°C (75°F)	237 mm (9.3 inches)	84%	very high
October Weather	19°C (66°F)	172 mm (6.8 inches)	79%	high
November Weather	13°C (55°F)	37 mm (1.5 inches)	76%	high
December Weather	7°C (46°F)	61 mm (2.4 inches)	75%	moderate