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December Weather in Ryotsu-minato, Japan

Last updated: August 23, 2025

In December, the average temperature in Ryotsu-minato, Japan hovers around 7°C (44°F). Expect a range of -1°C (31°F) as the chilly minimum to a pleasant maximum of 17°C (63°F). During this time, you'll likely experience 187 mm (7.3 in) of precipitation spread over 25 days, accompanied by a high average humidity of 86%. Be sure to prepare for a mix of cool and damp weather!

December Temperature in Ryotsu-minato

In December in Ryotsu-minato, the average temperature is 7°C (44°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -1°C (31°F). It's advisable to pack layers and be prepared for chilly evenings while exploring the sights.

December Weather in Ryotsu-minato: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Ryotsu-minato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ryotsu-minato, December typically has an average temperature of 7°C (44°F), with highs reaching up to 17°C (63°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec394045526268778174645444
Data source: Temperature data for Ryotsu-minato 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 Ryotsu-minato

In Ryotsu-minato in December, the total precipitation amount is 187 mm (7.3 in) spread across 25 days.

December Precipitation Trends in Ryotsu-minato

The chart displays monthly precipitation patterns in Ryotsu-minato, 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 Ryotsu-minato, December typically receives around 187 mm (7.3 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec1341061031129493258215160157124187
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ryotsu-minato

In Ryotsu-minato in December, humidity is 86%. With an average temperature of 7°C (44°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite uninviting.

December Average Humidity in Ryotsu-minato

This chart illustrates the average monthly humidity levels in Ryotsu-minato, 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 Ryotsu-minato 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 Ryotsu-minato

In Ryotsu-minato 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 Ryotsu-minato, you can check the information here.

Maximum UV Index Levels in Ryotsu-minato for December

The chart shows the monthly maximum UV Index (UVI) for Ryotsu-minato 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 Ryotsu-minato typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478101011119643
Data source: Ryotsu-minato 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 Ryotsu-minato Compares to Other Months

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

This table compares monthly weather conditions in Ryotsu-minato, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)134 mm (5.3 inches)88%moderate
February Weather4°C (40°F)106 mm (4.2 inches)86%moderate
March Weather7°C (46°F)103 mm (4.0 inches)81%high
April Weather11°C (52°F)112 mm (4.4 inches)78%very high
May Weather16°C (62°F)94 mm (3.7 inches)81%very high
June Weather20°C (69°F)93 mm (3.6 inches)88%very high
July Weather25°C (77°F)258 mm (10.2 inches)92%extreme
August Weather27°C (81°F)215 mm (8.4 inches)92%extreme
September Weather23°C (74°F)160 mm (6.3 inches)89%very high
October Weather18°C (65°F)157 mm (6.2 inches)87%high
November Weather12°C (54°F)124 mm (4.9 inches)85%moderate
December Weather7°C (44°F)187 mm (7.3 inches)86%moderate

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