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December Weather in Yanaizu, Japan

Last updated: August 23, 2025

In December, the average temperature in Yanaizu, Japan hovers around 1°C (35°F), with a minimum dipping to -10°C (15°F) and a maximum reaching 17°C (63°F). Be prepared for moist conditions, as the area experiences an average precipitation of 176 mm (6.9 in) over 22 days, resulting in a high average humidity of 86%.

December Temperature in Yanaizu

In December in Yanaizu, the average temperature is 1°C (35°F), with maximums reaching up to 17°C (63°F) and minimums dipping as low as -10°C (15°F). Travelers should prepare for a wide range of temperatures and pack accordingly to enjoy their visit comfortably.

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

The chart illustrates December temperature patterns in Yanaizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanaizu, December typically has an average temperature of 1°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec303138475965737567574634
Data source: Temperature data for Yanaizu 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 Yanaizu

In Yanaizu in December, the total precipitation amount is 176 mm (6.9 in) spread over 22 days.

December Precipitation Trends in Yanaizu

The chart displays monthly precipitation patterns in Yanaizu, 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 Yanaizu, December typically receives around 176 mm (6.9 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec157155147127111117256153126168100176
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Yanaizu

In Yanaizu in December, humidity is 86%. With an average temperature of 1°C (35°F), this humidity feels like a biting chill that wraps around you, making outdoor exploration uncomfortable and requiring extra layers to stay warm while navigating the damp air.

December Average Humidity in Yanaizu

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

In Yanaizu 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 Yanaizu, you can check the information here.

Maximum UV Index Levels in Yanaizu for December

The chart shows the monthly maximum UV Index (UVI) for Yanaizu 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 Yanaizu typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111119753
Data source: Yanaizu 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 Yanaizu Compares to Other Months

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

This table compares monthly weather conditions in Yanaizu, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)157 mm (6.2 inches)88%moderate
February Weather-1°C (31°F)155 mm (6.1 inches)86%moderate
March Weather3°C (38°F)147 mm (5.8 inches)81%very high
April Weather9°C (48°F)127 mm (5.0 inches)78%very high
May Weather15°C (59°F)111 mm (4.4 inches)81%very high
June Weather18°C (65°F)117 mm (4.6 inches)88%extreme
July Weather23°C (73°F)256 mm (10.1 inches)92%extreme
August Weather24°C (76°F)153 mm (6.0 inches)92%extreme
September Weather19°C (67°F)126 mm (5.0 inches)89%very high
October Weather14°C (57°F)168 mm (6.6 inches)87%high
November Weather8°C (46°F)100 mm (3.9 inches)85%moderate
December Weather1°C (35°F)176 mm (6.9 inches)86%moderate

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