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December Weather in Shirone, Japan

Last updated: August 23, 2025

In December, the average temperature in Shirone, Japan hovers around 6°C (43°F), with temperatures dipping as low as -2°C (29°F) and peaking at a mild 20°C (68°F). Expect a precipitation level of 210 mm (8.3 in) spread over 26 days, contributing to the region's average humidity of 86%.

December Temperature in Shirone

In December in Shirone, the average temperature is 6°C (43°F), with maximums reaching 20°C (68°F) and minimums dipping as low as -2°C (29°F). This range of temperatures means it's wise to pack layers and prepare for both chilly mornings and milder afternoons while enjoying your travels.

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

The chart illustrates December temperature patterns in Shirone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shirone, December typically has an average temperature of 6°C (43°F), with highs reaching up to 20°C (68°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec383945536470798173635343
Data source: Temperature data for Shirone 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 Shirone

In Shirone in December, the precipitation amount is 210 mm (8.3 in) spread over 26 days.

December Precipitation Trends in Shirone

The chart displays monthly precipitation patterns in Shirone, 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 Shirone, December typically receives around 210 mm (8.3 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec165132123113108102261213145155153210
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Shirone

In Shirone in December humidity is 86%. With an average temperature of 6°C (43°F), this humidity feels like a chilling blanket enveloping you, making outdoor exploration feel damp and uncomfortable.

December Average Humidity in Shirone

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

In Shirone 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 Shirone, you can check the information here.

Maximum UV Index Levels in Shirone for December

The chart shows the monthly maximum UV Index (UVI) for Shirone 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 Shirone typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3479101011119643
Data source: Shirone 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 Shirone Compares to Other Months

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

This table compares monthly weather conditions in Shirone, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)165 mm (6.5 inches)88%moderate
February Weather4°C (39°F)132 mm (5.2 inches)86%moderate
March Weather7°C (46°F)123 mm (4.8 inches)81%high
April Weather12°C (53°F)113 mm (4.4 inches)78%very high
May Weather18°C (64°F)107 mm (4.2 inches)81%very high
June Weather21°C (70°F)102 mm (4.0 inches)88%very high
July Weather26°C (79°F)261 mm (10.3 inches)92%extreme
August Weather27°C (82°F)213 mm (8.4 inches)92%extreme
September Weather23°C (74°F)145 mm (5.7 inches)89%very high
October Weather17°C (64°F)155 mm (6.1 inches)87%high
November Weather11°C (53°F)153 mm (6.0 inches)85%moderate
December Weather6°C (43°F)210 mm (8.3 inches)86%moderate

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