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December Weather in Kato, Japan

Last updated: August 23, 2025

In Kato, Japan, the average temperature in December hovers around 7°C (44°F). Expect the minimum to dip as low as -7°C (20°F), while the maximum can rise to a pleasant 21°C (70°F). During this month, you can anticipate 56 mm (2.2 in) of precipitation over approximately 7 days, contributing to an average humidity of 82%.

December Temperature in Kato

In December in Kato, the average temperature is 7°C (44°F). Maximum temperatures can reach 21°C (70°F), while the minimum can drop as low as -7°C (20°F). Be prepared for a range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Kato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kato, December typically has an average temperature of 7°C (44°F), with highs reaching up to 21°C (70°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec404149576672808375655444
Data source: Temperature data for Kato 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 Kato

In Kato in December, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.

December Precipitation Trends in Kato

The chart displays monthly precipitation patterns in Kato, 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 Kato, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec44541051241231403031982132173956
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kato

In Kato in December, humidity is 82%. With an average temperature of 7°C (44°F), this humidity feels like an unwelcoming chill that seeps into your bones, making outdoor exploration feel damp and cumbersome.

December Average Humidity in Kato

This chart illustrates the average monthly humidity levels in Kato, 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 Kato is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kato

In Kato 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 Kato, you can check the information here.

Maximum UV Index Levels in Kato for December

The chart shows the monthly maximum UV Index (UVI) for Kato 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 Kato typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121210753
Data source: Kato 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 Kato Compares to Other Months

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

This table compares monthly weather conditions in Kato, 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)82%moderate
February Weather5°C (41°F)54 mm (2.1 inches)79%high
March Weather9°C (49°F)105 mm (4.1 inches)73%very high
April Weather14°C (57°F)124 mm (4.9 inches)74%very high
May Weather19°C (67°F)123 mm (4.8 inches)84%extreme
June Weather22°C (73°F)140 mm (5.5 inches)86%extreme
July Weather26°C (80°F)302 mm (11.9 inches)92%extreme
August Weather28°C (83°F)198 mm (7.8 inches)92%extreme
September Weather24°C (75°F)213 mm (8.4 inches)87%very high
October Weather18°C (65°F)217 mm (8.5 inches)85%high
November Weather12°C (54°F)38 mm (1.5 inches)84%moderate
December Weather7°C (44°F)56 mm (2.2 inches)82%moderate

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