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December Weather in Hikari, Japan

Last updated: August 23, 2025

In December, the average temperature in Hikari, Japan hovers around 9°C (49°F), with comfortable highs reaching up to 20°C (68°F) and cooler lows dipping to 1°C (34°F). Expect about 64 mm (2.5 in) of precipitation spread over 8 days, contributing to an average humidity of 79%, making for a damp but refreshing atmosphere.

December Temperature in Hikari

In December in Hikari, the average temperature is 9°C (49°F). Maximums can reach 20°C (68°F) and minimums can be as low as 1°C (34°F). This makes it a great time for travelers to enjoy the cool weather while exploring the beautiful sights of Hikari.

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

The chart illustrates December temperature patterns in Hikari, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hikari, December typically has an average temperature of 9°C (49°F), with highs reaching up to 20°C (68°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec454551576571798276685849
Data source: Temperature data for Hikari 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 Hikari

In Hikari in December, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

December Precipitation Trends in Hikari

The chart displays monthly precipitation patterns in Hikari, 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 Hikari, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec54791271461591893562212151744364
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hikari

In Hikari in December humidity is 79%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress in layers and carrying a light raincoat for a comfortable travel experience.

December Average Humidity in Hikari

This chart illustrates the average monthly humidity levels in Hikari, 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 Hikari is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%71%78%84%86%92%91%84%83%81%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hikari

In Hikari 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 Hikari for better planning.

Maximum UV Index Levels in Hikari for December

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

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

This table compares monthly weather conditions in Hikari, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)54 mm (2.1 inches)75%moderate
February Weather7°C (45°F)79 mm (3.1 inches)71%moderate
March Weather11°C (51°F)127 mm (5.0 inches)71%very high
April Weather14°C (58°F)146 mm (5.7 inches)78%extreme
May Weather18°C (65°F)159 mm (6.3 inches)84%extreme
June Weather22°C (72°F)189 mm (7.5 inches)86%extreme
July Weather26°C (79°F)355 mm (14.0 inches)92%extreme
August Weather28°C (82°F)221 mm (8.7 inches)91%extreme
September Weather24°C (76°F)215 mm (8.5 inches)84%very high
October Weather20°C (68°F)173 mm (6.8 inches)83%high
November Weather15°C (59°F)43 mm (1.7 inches)81%high
December Weather9°C (49°F)64 mm (2.5 inches)79%moderate

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