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December Weather in Hiranai, Japan

Last updated: August 23, 2025

In December, the average temperature in Hiranai, Japan hovers around 2°C (37°F), with a minimum dipping to -6°C (22°F) and a maximum peaking at 14°C (57°F). Expect significant precipitation with an average of 141 mm (5.6 in) spread across 25 days, contributing to a rather humid climate with an average humidity of 77%.

December Temperature in Hiranai

In December, in Hiranai, the average temperature is 2°C (37°F). Maximums can reach 14°C (57°F) and minimums can be as low as -6°C (22°F). Be prepared for chilly weather and pack accordingly if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Hiranai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hiranai, December typically has an average temperature of 2°C (37°F), with highs reaching up to 14°C (57°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec323239475663717369594836
Data source: Temperature data for Hiranai 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 Hiranai

In Hiranai in December, the precipitation amount is 141 mm (5.6 in) spread over 25 days.

December Precipitation Trends in Hiranai

The chart displays monthly precipitation patterns in Hiranai, 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 Hiranai, December typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec8510089969611612418611015892141
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hiranai

In Hiranai in December humidity is 77%. With an average temperature of 2°C (37°F), this humidity feels like a cold, damp chill that penetrates your clothes, making travel uncomfortable and brisk.

December Average Humidity in Hiranai

This chart illustrates the average monthly humidity levels in Hiranai, 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 Hiranai is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hiranai

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

Maximum UV Index Levels in Hiranai for December

The chart shows the monthly maximum UV Index (UVI) for Hiranai 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 Hiranai typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235891010118642
Data source: Hiranai 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 Hiranai Compares to Other Months

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

This table compares monthly weather conditions in Hiranai, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)85 mm (3.4 inches)79%low
February Weather0°C (32°F)100 mm (3.9 inches)78%moderate
March Weather4°C (39°F)89 mm (3.5 inches)77%moderate
April Weather8°C (47°F)96 mm (3.8 inches)78%very high
May Weather13°C (56°F)96 mm (3.8 inches)86%very high
June Weather17°C (63°F)116 mm (4.6 inches)91%very high
July Weather21°C (71°F)124 mm (4.9 inches)95%very high
August Weather23°C (74°F)186 mm (7.3 inches)97%extreme
September Weather20°C (69°F)110 mm (4.3 inches)89%very high
October Weather15°C (59°F)158 mm (6.2 inches)81%high
November Weather9°C (48°F)92 mm (3.6 inches)78%moderate
December Weather2°C (37°F)141 mm (5.6 inches)77%low

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