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December Weather in Kashiwazaki, Japan

Last updated: August 23, 2025

In December, the average temperature in Kashiwazaki, Japan is a cool 5°C (41°F), with temperatures ranging from a brisk -6°C (21°F) to a pleasant 21°C (70°F). Expect 226 mm (8.9 in) of precipitation over 24 days, contributing to an average humidity of a cozy 86%. Be prepared for a damp and refreshing atmosphere!

December Temperature in Kashiwazaki

In December in Kashiwazaki, the average temperature is 5°C (41°F). The maximum can reach 21°C (70°F), and the minimum can be as low as -6°C (21°F). Be sure to pack layers to accommodate the wide range of temperatures while exploring the beauty of Kashiwazaki during this time.

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

The chart illustrates December temperature patterns in Kashiwazaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kashiwazaki, December typically has an average temperature of 5°C (41°F), with highs reaching up to 21°C (70°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536470788173625141
Data source: Temperature data for Kashiwazaki 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 Kashiwazaki

In Kashiwazaki in December, the precipitation amount is 226 mm (8.9 in) spread over 24 days.

December Precipitation Trends in Kashiwazaki

The chart displays monthly precipitation patterns in Kashiwazaki, 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 Kashiwazaki, December typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec194164135127123126326164171188149226
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kashiwazaki

In Kashiwazaki in December humidity is 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness in the air.

December Average Humidity in Kashiwazaki

This chart illustrates the average monthly humidity levels in Kashiwazaki, 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 Kashiwazaki is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kashiwazaki

In Kashiwazaki 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 Kashiwazaki, you can check the information here.

Maximum UV Index Levels in Kashiwazaki for December

The chart shows the monthly maximum UV Index (UVI) for Kashiwazaki 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 Kashiwazaki typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111119653
Data source: Kashiwazaki 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 Kashiwazaki Compares to Other Months

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

This table compares monthly weather conditions in Kashiwazaki, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)194 mm (7.6 inches)88%moderate
February Weather3°C (37°F)164 mm (6.5 inches)86%moderate
March Weather7°C (45°F)135 mm (5.3 inches)81%very high
April Weather12°C (53°F)127 mm (5.0 inches)78%very high
May Weather18°C (64°F)123 mm (4.8 inches)81%very high
June Weather21°C (70°F)126 mm (5.0 inches)88%extreme
July Weather26°C (79°F)326 mm (12.8 inches)92%extreme
August Weather27°C (81°F)164 mm (6.4 inches)92%extreme
September Weather23°C (73°F)171 mm (6.7 inches)89%very high
October Weather17°C (62°F)188 mm (7.4 inches)87%high
November Weather11°C (51°F)149 mm (5.8 inches)85%moderate
December Weather5°C (41°F)226 mm (8.9 inches)86%moderate

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