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December Weather in Shinjo, Japan

Last updated: August 23, 2025

In December, the average temperature in Shinjo, Japan hovers around 5°C (40°F). During this time, temperatures can dip as low as -6°C (21°F) and rise to a pleasant 20°C (67°F). Expect 109 mm (4.3 in) of precipitation spread over 19 days, accompanied by an average humidity level of 82%. Stay prepared for a mix of chilly and mild weather!

December Temperature in Shinjo

In December in Shinjo, the average temperature is 5°C (40°F), with maximums reaching 20°C (67°F) and minimums dropping as low as -6°C (21°F). Travelers should be prepared for a wide range of temperatures and dress in layers to ensure comfort during their visit.

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

The chart illustrates December temperature patterns in Shinjo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shinjo, December typically has an average temperature of 5°C (40°F), with highs reaching up to 20°C (67°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536369767971615040
Data source: Temperature data for Shinjo 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 Shinjo

In Shinjo in December, the precipitation amount is 109 mm (4.3 in) over the course of 19 days.

December Precipitation Trends in Shinjo

The chart displays monthly precipitation patterns in Shinjo, 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 Shinjo, December typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec849314413711721635028725420056109
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Shinjo

In Shinjo in December humidity is 82%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating multiple layers to stay warm and dry.

December Average Humidity in Shinjo

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

In Shinjo 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 Shinjo, you can check the information here.

Maximum UV Index Levels in Shinjo for December

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

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

This table compares monthly weather conditions in Shinjo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)84 mm (3.3 inches)82%moderate
February Weather3°C (37°F)93 mm (3.7 inches)79%high
March Weather7°C (45°F)144 mm (5.7 inches)73%very high
April Weather12°C (53°F)137 mm (5.4 inches)74%very high
May Weather17°C (63°F)117 mm (4.6 inches)84%extreme
June Weather20°C (69°F)216 mm (8.5 inches)86%extreme
July Weather25°C (77°F)350 mm (13.8 inches)92%extreme
August Weather26°C (79°F)287 mm (11.3 inches)92%extreme
September Weather21°C (71°F)254 mm (10.0 inches)87%very high
October Weather16°C (61°F)200 mm (7.9 inches)85%high
November Weather10°C (50°F)56 mm (2.2 inches)84%moderate
December Weather5°C (40°F)109 mm (4.3 inches)82%moderate

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