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December Weather in Kasagi, Japan

Last updated: August 23, 2025

In December, the average temperature in Kasagi, Japan hovers around 6°C (44°F). Visitors can expect a range, with minimums dipping to -3°C (26°F) and maximums soaring to 23°C (73°F). Precipitation is moderate, with an average of 61 mm (2.4 in) spread over 7 days, and the air remains quite humid at 83%.

December Temperature in Kasagi

In December in Kasagi, the average temperature is 6°C (44°F). The maximum can reach 23°C (73°F), and the minimum can be as low as -3°C (26°F). Pack accordingly to enjoy a range of weather conditions while exploring this destination.

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

The chart illustrates December temperature patterns in Kasagi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kasagi, December typically has an average temperature of 6°C (44°F), with highs reaching up to 23°C (73°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec394148576672808275645344
Data source: Temperature data for Kasagi 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 Kasagi

In Kasagi in December, the precipitation amount is 61 mm (2.4 in) over the course of 7 days.

December Precipitation Trends in Kasagi

The chart displays monthly precipitation patterns in Kasagi, 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 Kasagi, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec54651241291481562631561502484061
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kasagi

In Kasagi in December, humidity is 83%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and potentially leading to a sense of heaviness in the air.

December Average Humidity in Kasagi

This chart illustrates the average monthly humidity levels in Kasagi, 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 Kasagi is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kasagi

In Kasagi 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 Kasagi, you can check the information here.

Maximum UV Index Levels in Kasagi for December

The chart shows the monthly maximum UV Index (UVI) for Kasagi 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 Kasagi typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110753
Data source: Kasagi 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 Kasagi Compares to Other Months

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

This table compares monthly weather conditions in Kasagi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)54 mm (2.1 inches)82%moderate
February Weather5°C (41°F)65 mm (2.5 inches)79%high
March Weather9°C (49°F)124 mm (4.9 inches)74%very high
April Weather14°C (57°F)129 mm (5.1 inches)76%extreme
May Weather19°C (66°F)148 mm (5.8 inches)83%extreme
June Weather22°C (73°F)156 mm (6.1 inches)87%extreme
July Weather26°C (80°F)263 mm (10.3 inches)93%extreme
August Weather28°C (83°F)156 mm (6.1 inches)91%extreme
September Weather24°C (75°F)150 mm (5.9 inches)87%very high
October Weather18°C (65°F)248 mm (9.7 inches)85%high
November Weather12°C (53°F)40 mm (1.6 inches)83%moderate
December Weather6°C (44°F)61 mm (2.4 inches)83%moderate

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