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December Weather in Kasamatsucho, Japan

Last updated: August 23, 2025

In December, the average temperature in Kasamatsucho, Japan hovers around 7°C (45°F). Expect a range that can dip to a chilly -5°C (24°F) at the lowest, while reaching a pleasant 20°C (68°F) at its peak. Be prepared for 68 mm (2.7 in) of precipitation over approximately 7 days, and don't forget your layers, as the average humidity sits at a brisk 83%.

December Temperature in Kasamatsucho

In December in Kasamatsucho, the average temperature is 7°C (45°F). The maximum can reach 20°C (68°F) and the minimum can be as low as -5°C (24°F). This variability makes it essential for travelers to pack layers to accommodate both warm and chilly conditions.

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

The chart illustrates December temperature patterns in Kasamatsucho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kasamatsucho, December typically has an average temperature of 7°C (45°F), with highs reaching up to 20°C (68°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec414250586773808476665545
Data source: Temperature data for Kasamatsucho 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 Kasamatsucho

In Kasamatsucho in December, the precipitation amount is 68 mm (2.7 in) over the course of 7 days.

December Precipitation Trends in Kasamatsucho

The chart displays monthly precipitation patterns in Kasamatsucho, 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 Kasamatsucho, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec52591511631961963842532252466168
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kasamatsucho

In Kasamatsucho in December, humidity is 83%. With an average temperature of 7°C (45°F), this humidity feels like a chilly blanket wrapping around you, making travel somewhat uncomfortable as you navigate the dampness that settles in your clothes, leading to a heavy and muggy experience outdoors.

December Average Humidity in Kasamatsucho

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

In Kasamatsucho 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 Kasamatsucho, you can check the information here.

Maximum UV Index Levels in Kasamatsucho for December

The chart shows the monthly maximum UV Index (UVI) for Kasamatsucho 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 Kasamatsucho typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110753
Data source: Kasamatsucho 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 Kasamatsucho Compares to Other Months

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

This table compares monthly weather conditions in Kasamatsucho, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)52 mm (2.0 inches)82%moderate
February Weather6°C (42°F)59 mm (2.3 inches)79%high
March Weather10°C (50°F)151 mm (6.0 inches)74%very high
April Weather14°C (58°F)163 mm (6.4 inches)76%very high
May Weather19°C (67°F)196 mm (7.7 inches)83%extreme
June Weather23°C (74°F)196 mm (7.7 inches)87%extreme
July Weather27°C (81°F)384 mm (15.1 inches)93%extreme
August Weather29°C (84°F)253 mm (10.0 inches)91%extreme
September Weather25°C (76°F)225 mm (8.9 inches)87%very high
October Weather19°C (66°F)246 mm (9.7 inches)85%high
November Weather13°C (55°F)61 mm (2.4 inches)83%moderate
December Weather7°C (45°F)68 mm (2.7 inches)83%moderate

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