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December Weather in Oketo, Japan

Last updated: August 23, 2025

In December at Oketo, Japan, the average temperature hovers around -5°C (23°F). Expect chills as the minimum can drop to a bone-numbing -19°C (-2°F), while the maximum may reach a mild 11°C (53°F). During this month, anticipate about 60 mm (2.3 in) of rainfall spread over 12 days, with an average humidity level of 79%. Prepare accordingly for a brisk and occasionally wet experience!

December Temperature in Oketo

In December in Oketo, the average temperature is -5°C (23°F). The maximum can reach 11°C (53°F), and the minimum can be as low as -19°C (-2°F). Travelers should prepare for cold weather and dress warmly to fully enjoy their visit.

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

The chart illustrates December temperature patterns in Oketo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oketo, December typically has an average temperature of -5°C (23°F), with highs reaching up to 11°C (53°F) and lows dropping to around -19°C (-2°F).
JanFebMarAprMayJunJulAugSepOctNovDec161828395157666559483523
Data source: Temperature data for Oketo 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 Oketo

In Oketo, in December, the precipitation amount is 60 mm (2.3 in) over a duration of 12 days.

December Precipitation Trends in Oketo

The chart displays monthly precipitation patterns in Oketo, 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 Oketo, December typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec59628875991231221671011238960
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Oketo

In Oketo in December, humidity is 79%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that penetrates through layers of clothing, making traveling quite uncomfortable and requiring extra preparation to stay warm and dry.

December Average Humidity in Oketo

This chart illustrates the average monthly humidity levels in Oketo, 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 Oketo is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%83%86%88%93%96%89%83%80%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Oketo

In Oketo 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 Oketo, you can visit Hourly UV Index in Oketo.

Maximum UV Index Levels in Oketo for December

The chart shows the monthly maximum UV Index (UVI) for Oketo 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 Oketo typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2368891098532
Data source: Oketo 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 Oketo Compares to Other Months

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

This table compares monthly weather conditions in Oketo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)59 mm (2.3 inches)84%low
February Weather-8°C (18°F)62 mm (2.4 inches)83%moderate
March Weather-2°C (29°F)88 mm (3.5 inches)83%high
April Weather4°C (39°F)75 mm (3.0 inches)83%very high
May Weather11°C (52°F)99 mm (3.9 inches)86%very high
June Weather14°C (57°F)123 mm (4.8 inches)88%very high
July Weather19°C (66°F)122 mm (4.8 inches)93%very high
August Weather18°C (65°F)167 mm (6.6 inches)96%very high
September Weather15°C (59°F)101 mm (4.0 inches)89%very high
October Weather9°C (48°F)123 mm (4.9 inches)83%moderate
November Weather2°C (36°F)89 mm (3.5 inches)80%moderate
December Weather-5°C (23°F)60 mm (2.3 inches)79%low

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