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December Weather in Shibukawa, Japan

Last updated: August 23, 2025

In December, the average temperature in Shibukawa, Japan hovers around 5°C (40°F), making it a cool time of year. Expect temperatures to dip as low as -8°C (19°F), while occasionally soaring to a warm 18°C (65°F). Despite the chill, keep an umbrella handy as precipitation averages 61 mm (2.4 in) spread over 11 days, all under a notably high average humidity of 86%.

December Temperature in Shibukawa

In December in Shibukawa, the average temperature is 5°C (40°F). Maximum temperatures can reach up to 18°C (65°F), while minimums can drop as low as -8°C (19°F). Be sure to pack layers for your trip, as you can experience quite a range of temperatures during this time.

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

The chart illustrates December temperature patterns in Shibukawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shibukawa, December typically has an average temperature of 5°C (40°F), with highs reaching up to 18°C (65°F) and lows dropping to around -8°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec353745526268747769605040
Data source: Temperature data for Shibukawa 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 Shibukawa

In Shibukawa in December, the total precipitation amount is 61 mm (2.4 in) over the course of 11 days.

December Precipitation Trends in Shibukawa

The chart displays monthly precipitation patterns in Shibukawa, 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 Shibukawa, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec64611241361451602711731892654761
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Shibukawa

In Shibukawa in December humidity is 86%. With an average temperature of 5°C (40°F), this humidity feels like wrapping yourself in a damp blanket—uncomfortably heavy and chilly, making it difficult to enjoy outdoor activities without the constant chill seeping in.

December Average Humidity in Shibukawa

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

In Shibukawa 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 Shibukawa, you can check the information here.

Maximum UV Index Levels in Shibukawa for December

The chart shows the monthly maximum UV Index (UVI) for Shibukawa 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 Shibukawa typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46891111111110753
Data source: Shibukawa 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 Shibukawa Compares to Other Months

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

This table compares monthly weather conditions in Shibukawa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)64 mm (2.5 inches)88%moderate
February Weather3°C (37°F)61 mm (2.4 inches)86%high
March Weather7°C (45°F)124 mm (4.9 inches)81%very high
April Weather11°C (53°F)136 mm (5.4 inches)78%very high
May Weather17°C (62°F)145 mm (5.7 inches)81%extreme
June Weather20°C (68°F)160 mm (6.3 inches)88%extreme
July Weather24°C (75°F)271 mm (10.7 inches)92%extreme
August Weather25°C (78°F)173 mm (6.8 inches)92%extreme
September Weather21°C (70°F)188 mm (7.4 inches)89%very high
October Weather15°C (60°F)265 mm (10.5 inches)87%high
November Weather10°C (50°F)47 mm (1.9 inches)85%moderate
December Weather5°C (40°F)61 mm (2.4 inches)86%moderate

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