December Weather in Ono, Japan

Last updated: August 23, 2025

In December, the average temperature in Ono, Japan hovers around 2°C (36°F), with a minimum dipping to -13°C (8°F) and reaching a maximum of 16°C (62°F). This month also sees an impressive 195 mm (7.7 in) of precipitation over 23 days, contributing to an average humidity of 83%. Be prepared for a mix of chilly days and wet weather!

December Temperature in Ono

In December in Ono, the average temperature is 2°C (36°F). Maximums can reach 16°C (62°F), while minimums can plummet to as low as -13°C (8°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates December temperature patterns in Ono, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ono, December typically has an average temperature of 2°C (36°F), with highs reaching up to 16°C (62°F) and lows dropping to around -13°C (8°F).

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

December Precipitation in Ono

In Ono in December, the precipitation amount is 195 mm (7.7 in) spread over 23 days, indicating a significant amount of rainfall for that period.

December Precipitation Trends in Ono

The chart displays monthly precipitation patterns in Ono, 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 Ono, December typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 23 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 Ono

In Ono in December, humidity is 83%. With an average temperature of 2°C (36°F), this humidity feels like a cold, damp blanket, making travel uncomfortable as the chill seeps into your bones and the moisture clings to your clothing, forcing you to constantly seek warmth and shelter.

December Average Humidity in Ono

This chart illustrates the average monthly humidity levels in Ono, 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 Ono is approximately 83%, 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 Ono

In Ono in December, 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 for better planning.

Maximum UV Index Levels in Ono for December

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

Data source: Ono 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 Ono Compares to Other Months

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

This table compares monthly weather conditions in Ono, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	165 mm (6.5 inches)	82%	moderate
February Weather	-1°C (31°F)	167 mm (6.6 inches)	79%	high
March Weather	4°C (40°F)	191 mm (7.5 inches)	74%	very high
April Weather	9°C (49°F)	216 mm (8.5 inches)	76%	very high
May Weather	15°C (59°F)	201 mm (7.9 inches)	83%	extreme
June Weather	18°C (65°F)	226 mm (8.9 inches)	87%	extreme
July Weather	23°C (73°F)	436 mm (17.2 inches)	93%	extreme
August Weather	24°C (76°F)	304 mm (12.0 inches)	91%	extreme
September Weather	20°C (68°F)	244 mm (9.6 inches)	87%	very high
October Weather	14°C (58°F)	230 mm (9.1 inches)	85%	high
November Weather	8°C (46°F)	127 mm (5.0 inches)	83%	moderate
December Weather	2°C (36°F)	195 mm (7.7 inches)	83%	moderate