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December Weather in Ono-hara, Japan

Last updated: August 23, 2025

In December, the average temperature in Ono-hara, Japan hovers around 7°C (46°F), with a minimum dipping to -1°C (31°F) and a pleasant maximum reaching 20°C (69°F). Expect about 61 mm (2.4 in) of precipitation spread over 6 days, accompanied by an average humidity of 75%. Be prepared for a mix of cool and mild weather as you explore!

December Temperature in Ono-hara

In December in Ono-hara, the average temperature is 7°C (46°F). Maximum temperatures can reach 20°C (69°F), while minimums can dip as low as -1°C (31°F). Be prepared for a mix of mild and chilly weather during your travels.

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

The chart illustrates December 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, December typically has an average temperature of 7°C (46°F), with highs reaching up to 20°C (69°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec424350576672798275665545
Data source: Temperature data for Ono-hara generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Ono-hara

In Ono-hara in December, the total precipitation amount is 61 mm (2.4 in) spread over a period of 6 days.

December Precipitation Trends in Ono-hara

The chart displays monthly precipitation patterns in Ono-hara, 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-hara, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec49691251371361813862562371723762
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ono-hara

In Ono-hara in December humidity is 75%. With an average temperature of 7°C (46°F), this humidity feels like a chilly dampness that clings to your skin, making every step outdoors feel heavier and the cold seep into your bones, which can be quite uncomfortable for traveling.

December Average Humidity in Ono-hara

This chart illustrates the average monthly humidity levels in Ono-hara, 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-hara is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%72%69%75%84%88%95%93%84%79%76%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ono-hara

In Ono-hara 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-hara for better planning.

Maximum UV Index Levels in Ono-hara for December

The chart shows the monthly maximum UV Index (UVI) for Ono-hara 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-hara typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121210764
Data source: Ono-hara 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-hara Compares to Other Months

Weather in Ono-hara varies notably across the year, with each month offering distinct climate conditions. This page compares December’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 December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)49 mm (1.9 inches)76%moderate
February Weather6°C (43°F)69 mm (2.7 inches)72%moderate
March Weather10°C (50°F)125 mm (4.9 inches)69%very high
April Weather14°C (58°F)137 mm (5.4 inches)75%extreme
May Weather19°C (66°F)136 mm (5.4 inches)84%extreme
June Weather22°C (72°F)181 mm (7.1 inches)88%extreme
July Weather26°C (79°F)386 mm (15.2 inches)95%extreme
August Weather28°C (82°F)256 mm (10.1 inches)93%extreme
September Weather24°C (75°F)237 mm (9.3 inches)84%very high
October Weather19°C (66°F)172 mm (6.8 inches)79%high
November Weather13°C (55°F)37 mm (1.5 inches)76%high
December Weather7°C (46°F)61 mm (2.4 inches)75%moderate

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