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December Weather in Otsuchi, Japan

Last updated: August 23, 2025

In December, the average temperature in Otsuchi, Japan hovers around 5°C (42°F). Expect chilly days with temperatures dipping to a minimum of -3°C (26°F) and peaking at a comfortable 15°C (60°F). Be prepared for about 71 mm (2.8 in) of rain spread over 10 days, contributing to an average humidity level of 80%.

December Temperature in Otsuchi

In December in Otsuchi, the average temperature is 5°C (42°F). The maximum can reach 15°C (60°F), while the minimum can be as low as -3°C (26°F). Travelers should prepare for a range of temperatures and pack accordingly to ensure comfort during their visit.

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

The chart illustrates December temperature patterns in Otsuchi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otsuchi, December typically has an average temperature of 5°C (42°F), with highs reaching up to 15°C (60°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec373641475461687269615241
Data source: Temperature data for Otsuchi 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 Otsuchi

In Otsuchi in December, the precipitation amount is 71 mm (2.8 in) over a duration of 10 days.

December Precipitation Trends in Otsuchi

The chart displays monthly precipitation patterns in Otsuchi, 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 Otsuchi, December typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec51591151271161211762001852435771
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Otsuchi

In Otsuchi in December humidity is 80%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that can seep into your bones, making outdoor adventures uncomfortable and urging travelers to seek warm shelter often.

December Average Humidity in Otsuchi

This chart illustrates the average monthly humidity levels in Otsuchi, 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 Otsuchi is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Otsuchi

In Otsuchi 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 Otsuchi, you can check the information here.

Maximum UV Index Levels in Otsuchi for December

The chart shows the monthly maximum UV Index (UVI) for Otsuchi 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 Otsuchi typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891110109643
Data source: Otsuchi 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 Otsuchi Compares to Other Months

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

This table compares monthly weather conditions in Otsuchi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)51 mm (2.0 inches)80%moderate
February Weather2°C (37°F)59 mm (2.3 inches)79%moderate
March Weather5°C (42°F)115 mm (4.5 inches)77%high
April Weather8°C (47°F)127 mm (5.0 inches)75%very high
May Weather12°C (55°F)116 mm (4.6 inches)80%very high
June Weather16°C (61°F)120 mm (4.7 inches)87%extreme
July Weather20°C (69°F)175 mm (6.9 inches)92%very high
August Weather22°C (72°F)200 mm (7.9 inches)92%very high
September Weather20°C (69°F)185 mm (7.3 inches)86%very high
October Weather16°C (61°F)243 mm (9.6 inches)82%high
November Weather11°C (52°F)57 mm (2.3 inches)79%moderate
December Weather5°C (42°F)71 mm (2.8 inches)80%moderate

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