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December Weather in Ishioka, Japan

Last updated: August 23, 2025

In Ishioka, Japan, the average temperature in December hovers around 7°C (44°F). Expect a minimum of -3°C (27°F) and a maximum reaching 20°C (68°F). During this time, the area receives about 58 mm (2.3 in) of precipitation spread over 6 days, resulting in an average humidity of 77%. Prepare for a mix of cool temperatures and occasional rain!

December Temperature in Ishioka

In December in Ishioka, the average temperature is 7°C (44°F). The maximum can reach 20°C (68°F), and the minimum can be as low as -3°C (27°F). Travelers should be prepared for fluctuating temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Ishioka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ishioka, December typically has an average temperature of 7°C (44°F), with highs reaching up to 20°C (68°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec394249566671788174645544
Data source: Temperature data for Ishioka 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 Ishioka

In Ishioka in December, the precipitation amount is 58 mm (2.3 in) over the course of 6 days.

December Precipitation Trends in Ishioka

The chart displays monthly precipitation patterns in Ishioka, 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 Ishioka, December typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec44411341181311402201171722397858
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ishioka

In Ishioka in December, humidity is 77%. With an average temperature of 7°C (44°F), this humidity feels like a chilly mist that wraps around you, making outdoor activities somewhat uncomfortable and best suited for those who enjoy brisk, invigorating walks rather than strenuous sightseeing.

December Average Humidity in Ishioka

This chart illustrates the average monthly humidity levels in Ishioka, 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 Ishioka is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%72%73%80%87%93%90%84%80%77%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ishioka

In Ishioka in December, 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 Ishioka, you can check the information here.

Maximum UV Index Levels in Ishioka for December

The chart shows the monthly maximum UV Index (UVI) for Ishioka 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 Ishioka typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109653
Data source: Ishioka 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 Ishioka Compares to Other Months

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

This table compares monthly weather conditions in Ishioka, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)44 mm (1.7 inches)76%moderate
February Weather5°C (42°F)41 mm (1.6 inches)75%moderate
March Weather10°C (49°F)134 mm (5.3 inches)72%high
April Weather14°C (57°F)118 mm (4.6 inches)73%very high
May Weather19°C (66°F)131 mm (5.1 inches)80%very high
June Weather22°C (71°F)140 mm (5.5 inches)87%extreme
July Weather25°C (78°F)220 mm (8.7 inches)92%extreme
August Weather27°C (81°F)117 mm (4.6 inches)90%very high
September Weather23°C (74°F)172 mm (6.8 inches)84%very high
October Weather18°C (65°F)239 mm (9.4 inches)80%high
November Weather13°C (55°F)78 mm (3.1 inches)77%moderate
December Weather7°C (44°F)58 mm (2.3 inches)77%moderate

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