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December Weather in Honmachi, Japan

Last updated: August 23, 2025

In Honmachi, Japan, the average temperature in December hovers around -1°C (30°F). Conditions can vary significantly, with minimums dipping to -8°C (18°F) and maximums reaching up to 11°C (52°F). This month also brings about 119 mm (4.7 in) of precipitation over roughly 20 days, resulting in an average humidity of 79%. Stay prepared for chilly and wet weather!

December Temperature in Honmachi

In December in Honmachi, the average temperature is -1°C (30°F), with maximums reaching 11°C (52°F) and minimums dropping as low as -8°C (18°F). If you're traveling during this time, be sure to pack warm clothing to stay comfortable in the chilly weather.

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

The chart illustrates December temperature patterns in Honmachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Honmachi, December typically has an average temperature of -1°C (30°F), with highs reaching up to 11°C (52°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec241928364653616462534129
Data source: Temperature data for Honmachi 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 Honmachi

In Honmachi in December, the total precipitation amount reaches 119 mm (4.7 in) over the course of 20 days.

December Precipitation Trends in Honmachi

The chart displays monthly precipitation patterns in Honmachi, 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 Honmachi, December typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec776893721071017011495187139119
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Honmachi

In Honmachi in December, humidity is 79%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill in the air, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Honmachi

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

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

Maximum UV Index Levels in Honmachi for December

The chart shows the monthly maximum UV Index (UVI) for Honmachi 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 Honmachi typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357891098532
Data source: Honmachi 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 Honmachi Compares to Other Months

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

This table compares monthly weather conditions in Honmachi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)77 mm (3.0 inches)84%low
February Weather-7°C (20°F)68 mm (2.7 inches)83%moderate
March Weather-2°C (28°F)93 mm (3.7 inches)83%moderate
April Weather2°C (36°F)72 mm (2.8 inches)83%high
May Weather8°C (46°F)107 mm (4.2 inches)86%very high
June Weather12°C (53°F)100 mm (4.0 inches)88%very high
July Weather16°C (62°F)70 mm (2.8 inches)93%very high
August Weather18°C (65°F)114 mm (4.5 inches)96%very high
September Weather16°C (62°F)95 mm (3.8 inches)89%very high
October Weather12°C (53°F)187 mm (7.3 inches)83%moderate
November Weather5°C (42°F)139 mm (5.5 inches)80%moderate
December Weather-1°C (30°F)119 mm (4.7 inches)79%low

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