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December Weather in Naganohara, Japan

Last updated: August 23, 2025

In December, the average temperature in Naganohara, Japan is a brisk 2°C (35°F). Expect fluctuations, with minimums dipping to -8°C (18°F) and maximums peaking at 17°C (63°F). During this time, precipitation averages 74 mm (2.9 in) over approximately 15 days, contributing to a notably high average humidity of 86%. Embrace the chill and prepare for wet days ahead!

December Temperature in Naganohara

In December in Naganohara, the average temperature is 2°C (35°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -8°C (18°F). Visitors should be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Naganohara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naganohara, December typically has an average temperature of 2°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec303240485964717466564535
Data source: Temperature data for Naganohara 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 Naganohara

In Naganohara in December, the precipitation amount is 74 mm (2.9 in) over the course of 15 days.

December Precipitation Trends in Naganohara

The chart displays monthly precipitation patterns in Naganohara, 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 Naganohara, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec78721251301732233412442222645474
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Naganohara

In Naganohara in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in Naganohara

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

In Naganohara 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 Naganohara, you can check the information here.

Maximum UV Index Levels in Naganohara for December

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

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

This table compares monthly weather conditions in Naganohara, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)78 mm (3.1 inches)88%moderate
February Weather0°C (32°F)72 mm (2.8 inches)86%high
March Weather4°C (40°F)125 mm (4.9 inches)81%very high
April Weather9°C (48°F)130 mm (5.1 inches)78%very high
May Weather15°C (59°F)173 mm (6.8 inches)81%extreme
June Weather18°C (64°F)223 mm (8.8 inches)88%extreme
July Weather22°C (72°F)341 mm (13.4 inches)92%extreme
August Weather23°C (74°F)244 mm (9.6 inches)92%extreme
September Weather19°C (66°F)222 mm (8.7 inches)89%very high
October Weather13°C (56°F)264 mm (10.4 inches)87%high
November Weather7°C (45°F)54 mm (2.1 inches)85%moderate
December Weather2°C (35°F)74 mm (2.9 inches)86%moderate

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