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December Weather in Semboku, Japan

Last updated: August 23, 2025

In December, the average temperature in Semboku, Japan hovers around -1°C (30°F). The climate can be quite chilly, with minimum temperatures dipping to -12°C (10°F) and reaching a maximum of 11°C (52°F). Expect 153 mm (6.0 in) of precipitation spread over 25 days, contributing to an average humidity of 80%. Dress warmly and be prepared for a wet, cool month!

December Temperature in Semboku

In December in Semboku, the average temperature is -1°C (30°F). Maximums can reach 11°C (52°F), while minimums can drop to as low as -12°C (10°F). Be prepared for chilly weather and pack warm clothing for your trip!

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

The chart illustrates December temperature patterns in Semboku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semboku, 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 -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec252634445663717264534129
Data source: Temperature data for Semboku 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 Semboku

In Semboku in December, the precipitation amount is 153 mm (6.0 in), which occurs over a span of 25 days.

December Precipitation Trends in Semboku

The chart displays monthly precipitation patterns in Semboku, 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 Semboku, December typically receives around 153 mm (6.0 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec105140141170160182237238170179134153
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Semboku

In Semboku in December, humidity is 80%. With an average temperature of -1°C (30°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and travel quite challenging.

December Average Humidity in Semboku

This chart illustrates the average monthly humidity levels in Semboku, 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 Semboku is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Semboku

In Semboku 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 Semboku, you can check the information here.

Maximum UV Index Levels in Semboku for December

The chart shows the monthly maximum UV Index (UVI) for Semboku 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 Semboku typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346991010119643
Data source: Semboku 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 Semboku Compares to Other Months

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

This table compares monthly weather conditions in Semboku, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)105 mm (4.1 inches)80%moderate
February Weather-3°C (26°F)140 mm (5.5 inches)79%moderate
March Weather1°C (34°F)141 mm (5.6 inches)77%high
April Weather6°C (44°F)170 mm (6.7 inches)75%very high
May Weather13°C (56°F)160 mm (6.3 inches)80%very high
June Weather17°C (63°F)182 mm (7.2 inches)87%very high
July Weather21°C (71°F)237 mm (9.3 inches)92%very high
August Weather22°C (73°F)238 mm (9.4 inches)92%extreme
September Weather18°C (65°F)170 mm (6.7 inches)86%very high
October Weather12°C (54°F)179 mm (7.1 inches)82%high
November Weather5°C (42°F)134 mm (5.3 inches)79%moderate
December Weather-1°C (30°F)153 mm (6.0 inches)80%moderate

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