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December Weather in Omu, Japan

Last updated: August 23, 2025

In December, the average temperature in Omu, Japan hovers around -3°C (27°F), with a typical minimum of -13°C (9°F) and a maximum reaching 12°C (53°F). Prepare for wet weather, as the region experiences about 69 mm (2.7 in) of precipitation over 21 days. Don’t forget your layers; the average humidity is a chilly 82%!

December Temperature in Omu

In December, in Omu, the average temperature is -3°C (27°F). Maximum temperatures can reach 12°C (53°F), while the minimum can drop as low as -13°C (9°F). Travelers should be prepared for chilly conditions and pack accordingly to enjoy their stay.

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

The chart illustrates December temperature patterns in Omu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omu, December typically has an average temperature of -3°C (27°F), with highs reaching up to 12°C (53°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec202030405056656662513927
Data source: Temperature data for Omu 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 Omu

In Omu in December, the precipitation amount is 69 mm (2.7 in) spread over 21 days.

December Precipitation Trends in Omu

The chart displays monthly precipitation patterns in Omu, 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 Omu, December typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec636373608788821578013410269
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Omu

In Omu in December, humidity is 82%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm while navigating through the damp air.

December Average Humidity in Omu

This chart illustrates the average monthly humidity levels in Omu, 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 Omu is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%85%85%88%88%93%95%88%81%78%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Omu

In Omu in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Omu, you can visit Hourly UV Index in Omu.

Maximum UV Index Levels in Omu for December

The chart shows the monthly maximum UV Index (UVI) for Omu 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 Omu typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236789997532
Data source: Omu 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 Omu Compares to Other Months

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

This table compares monthly weather conditions in Omu, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)63 mm (2.5 inches)87%low
February Weather-6°C (21°F)63 mm (2.5 inches)86%moderate
March Weather-1°C (30°F)73 mm (2.9 inches)85%high
April Weather4°C (40°F)60 mm (2.3 inches)85%high
May Weather10°C (51°F)87 mm (3.4 inches)88%very high
June Weather13°C (56°F)88 mm (3.5 inches)88%very high
July Weather18°C (65°F)82 mm (3.2 inches)93%very high
August Weather19°C (66°F)157 mm (6.2 inches)95%very high
September Weather17°C (62°F)80 mm (3.1 inches)88%high
October Weather11°C (51°F)134 mm (5.3 inches)80%moderate
November Weather4°C (39°F)102 mm (4.0 inches)78%moderate
December Weather-3°C (27°F)69 mm (2.7 inches)82%low

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