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December Weather in Katashina, Japan

Last updated: August 23, 2025

In December, the average temperature in Katashina, Japan hovers around 0°C (32°F). Expect chilly days with minimum temperatures dipping to -14°C (8°F), while the mercury may rise to a maximum of 16°C (61°F). Be prepared for 93 mm (3.7 in) of precipitation spread over 18 days, and don't forget your umbrella, as the average humidity lingers at a brisk 86%.

December Temperature in Katashina

In December in Katashina, the average temperature is 0°C (32°F), with maximums reaching up to 16°C (61°F) and minimums dropping as low as -14°C (8°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates December temperature patterns in Katashina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katashina, December typically has an average temperature of 0°C (32°F), with highs reaching up to 16°C (61°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec272837455662697264544332
Data source: Temperature data for Katashina 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 Katashina

In Katashina in December, the precipitation amount is 93 mm (3.7 in) spread over 18 days, indicating a relatively wet period.

December Precipitation Trends in Katashina

The chart displays monthly precipitation patterns in Katashina, 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 Katashina, December typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec81781361341461832942111892466593
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Katashina

In Katashina in December humidity is 86%. With an average temperature of 0°C (32°F), this humidity feels like a biting chill that seeps into your bones, making travel feel uncomfortable and damp, as the cold air combines with the moisture to create a brisk sensation that may deter outdoor exploration.

December Average Humidity in Katashina

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

In Katashina 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 Katashina, you can check the information here.

Maximum UV Index Levels in Katashina for December

The chart shows the monthly maximum UV Index (UVI) for Katashina 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 Katashina typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101111111110753
Data source: Katashina 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 Katashina Compares to Other Months

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

This table compares monthly weather conditions in Katashina, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)80 mm (3.2 inches)88%moderate
February Weather-2°C (29°F)78 mm (3.1 inches)86%high
March Weather3°C (37°F)136 mm (5.4 inches)81%very high
April Weather7°C (45°F)134 mm (5.3 inches)78%very high
May Weather13°C (56°F)146 mm (5.7 inches)81%extreme
June Weather17°C (62°F)183 mm (7.2 inches)88%extreme
July Weather21°C (70°F)294 mm (11.6 inches)92%extreme
August Weather22°C (72°F)211 mm (8.3 inches)92%extreme
September Weather18°C (64°F)189 mm (7.5 inches)89%very high
October Weather12°C (54°F)246 mm (9.7 inches)87%high
November Weather6°C (43°F)65 mm (2.6 inches)85%moderate
December Weather0°C (32°F)93 mm (3.7 inches)86%moderate

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