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December Weather in Nambu, Japan

Last updated: August 23, 2025

In Nambu, Japan, the average temperature in December hovers around 5°C (41°F). Expect a minimum chill of -5°C (24°F) and the possibility of warming up to a pleasant 18°C (65°F). With an average humidity of 78%, prepare for a bit of moisture in the air. Additionally, anticipate approximately 94 mm (3.7 in) of precipitation over 10 days during this month.

December Temperature in Nambu

In December in Nambu, the average temperature is 5°C (41°F). Maximums can reach 18°C (65°F), while minimums can drop as low as -5°C (24°F). It's advisable to dress in layers and be prepared for a range of weather conditions when traveling during this time.

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

The chart illustrates December temperature patterns in Nambu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nambu, December typically has an average temperature of 5°C (41°F), with highs reaching up to 18°C (65°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec363845526066737669605041
Data source: Temperature data for Nambu 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 Nambu

In Nambu in December, the precipitation amount is 94 mm (3.7 in) over a duration of 10 days.

December Precipitation Trends in Nambu

The chart displays monthly precipitation patterns in Nambu, 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 Nambu, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7610024725423929855032430138110994
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Nambu

In Nambu in December, humidity is 78%. With an average temperature of 5°C (41°F), this humidity feels like walking through a chill that clings to your skin, making every breath feel damp and cold, which can be uncomfortable for traveling.

December Average Humidity in Nambu

This chart illustrates the average monthly humidity levels in Nambu, 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 Nambu is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Nambu

In Nambu in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Nambu for better planning.

Maximum UV Index Levels in Nambu for December

The chart shows the monthly maximum UV Index (UVI) for Nambu 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 Nambu typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
Data source: Nambu 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 Nambu Compares to Other Months

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

This table compares monthly weather conditions in Nambu, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)76 mm (3.0 inches)76%moderate
February Weather3°C (38°F)100 mm (3.9 inches)74%high
March Weather7°C (45°F)246 mm (9.7 inches)70%very high
April Weather11°C (52°F)254 mm (10.0 inches)74%very high
May Weather16°C (61°F)239 mm (9.4 inches)81%extreme
June Weather19°C (66°F)298 mm (11.7 inches)88%extreme
July Weather23°C (73°F)550 mm (21.6 inches)93%extreme
August Weather24°C (76°F)324 mm (12.8 inches)90%extreme
September Weather21°C (69°F)301 mm (11.8 inches)86%very high
October Weather15°C (60°F)381 mm (15.0 inches)83%high
November Weather10°C (50°F)109 mm (4.3 inches)80%moderate
December Weather5°C (41°F)94 mm (3.7 inches)78%moderate

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