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December Weather in Narashino, Japan

Last updated: August 23, 2025

In December, the average temperature in Narashino, Japan is a crisp 8°C (46°F). Visitors can expect a minimum temperature of -2°C (28°F) and a pleasant maximum of 21°C (70°F). With an average precipitation of 64 mm (2.5 in) spread over 7 days, and an average humidity of 78%, it's a month that beautifully balances cool air and refreshing rain.

December Temperature in Narashino

In December in Narashino, the average temperature is 8°C (46°F). Maximums can reach 21°C (70°F) and minimums can be as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack both warmer and lighter clothing options.

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

The chart illustrates December temperature patterns in Narashino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Narashino, December typically has an average temperature of 8°C (46°F), with highs reaching up to 21°C (70°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec414350576772788275655646
Data source: Temperature data for Narashino 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 Narashino

In Narashino in December, the precipitation amount is 64 mm (2.5 in) accumulated over a period of 7 days.

December Precipitation Trends in Narashino

The chart displays monthly precipitation patterns in Narashino, 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 Narashino, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec49431341161251602241051922619064
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Narashino

In Narashino in December, humidity is 78%. With an average temperature of 8°C (46°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to dress in layers to stay warm while exploring.

December Average Humidity in Narashino

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

In Narashino 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 Narashino, you can check the information here.

Maximum UV Index Levels in Narashino for December

The chart shows the monthly maximum UV Index (UVI) for Narashino 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 Narashino typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119753
Data source: Narashino 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 Narashino Compares to Other Months

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

This table compares monthly weather conditions in Narashino, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)49 mm (1.9 inches)76%moderate
February Weather6°C (44°F)43 mm (1.7 inches)74%moderate
March Weather10°C (51°F)134 mm (5.3 inches)70%high
April Weather14°C (58°F)116 mm (4.6 inches)74%very high
May Weather19°C (67°F)125 mm (4.9 inches)81%very high
June Weather22°C (72°F)160 mm (6.3 inches)88%extreme
July Weather26°C (79°F)224 mm (8.8 inches)93%extreme
August Weather28°C (82°F)105 mm (4.1 inches)90%extreme
September Weather24°C (75°F)192 mm (7.6 inches)86%very high
October Weather19°C (66°F)261 mm (10.3 inches)83%high
November Weather13°C (56°F)90 mm (3.5 inches)80%moderate
December Weather8°C (46°F)64 mm (2.5 inches)78%moderate

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