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December Weather in Koori, Japan

Last updated: August 23, 2025

In December, the average temperature in Koori, Japan hovers around 2°C (36°F). Temperatures can dip to a chilly -7°C (20°F) or rise to a pleasant 17°C (63°F). Expect around 68 mm (2.7 in) of precipitation spread over 15 days, and with an average humidity of 77%, be prepared for a damp atmosphere.

December Temperature in Koori

In December in Koori, the average temperature is 2°C (36°F). The maximum can reach 17°C (63°F), and the minimum can be as low as -7°C (20°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Koori, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koori, December typically has an average temperature of 2°C (36°F), with highs reaching up to 17°C (63°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec313341496066737668574736
Data source: Temperature data for Koori 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 Koori

In Koori in December, the total precipitation amount is 68 mm (2.7 in) recorded over a span of 15 days.

December Precipitation Trends in Koori

The chart displays monthly precipitation patterns in Koori, 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 Koori, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec62521121061131092481691542073868
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Koori

In Koori in December, humidity is 77%. With an average temperature of 2°C (36°F), this humidity feels like a chilly embrace, making every breath feel damp and cold, which can be challenging for traveling but adds an invigorating layer to the experience.

December Average Humidity in Koori

This chart illustrates the average monthly humidity levels in Koori, 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 Koori 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 Koori

In Koori 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 Koori, you can check the information here.

Maximum UV Index Levels in Koori for December

The chart shows the monthly maximum UV Index (UVI) for Koori 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 Koori typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119653
Data source: Koori 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 Koori Compares to Other Months

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

This table compares monthly weather conditions in Koori, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)62 mm (2.4 inches)76%moderate
February Weather1°C (33°F)52 mm (2.0 inches)75%moderate
March Weather5°C (41°F)112 mm (4.4 inches)72%high
April Weather10°C (50°F)106 mm (4.2 inches)73%very high
May Weather16°C (60°F)113 mm (4.5 inches)80%very high
June Weather19°C (66°F)109 mm (4.3 inches)87%extreme
July Weather23°C (74°F)248 mm (9.7 inches)92%extreme
August Weather24°C (76°F)169 mm (6.7 inches)90%extreme
September Weather20°C (68°F)154 mm (6.1 inches)84%very high
October Weather14°C (58°F)207 mm (8.2 inches)80%high
November Weather8°C (47°F)38 mm (1.5 inches)77%moderate
December Weather2°C (36°F)68 mm (2.7 inches)77%moderate

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