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December Weather in Motosu, Japan

Last updated: August 23, 2025

In December, the average temperature in Motosu, Japan is a cool 6°C (43°F), with extremes ranging from a brisk -5°C (23°F) to a mild 18°C (65°F). Expect 94 mm (3.7 in) of precipitation over 12 days, contributing to an average humidity of 83%. Be prepared for a mix of chilly air and damp conditions!

December Temperature in Motosu

In December in Motosu, the average temperature is 6°C (43°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -5°C (23°F). Be prepared for a mix of chilly and mild weather, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Motosu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Motosu, December typically has an average temperature of 6°C (43°F), with highs reaching up to 18°C (65°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec394048566571788174645343
Data source: Temperature data for Motosu 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 Motosu

In Motosu in December, the precipitation amount is 94 mm (3.7 in) spread over 12 days.

December Precipitation Trends in Motosu

The chart displays monthly precipitation patterns in Motosu, 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 Motosu, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec71791792232292454933222982347494
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Motosu

In Motosu in December, humidity is 83%. With an average temperature of 6°C (43°F), this humidity feels like a brisk chill that can make you feel colder than the actual temperature, often leading to a damp and uncomfortable experience for traveling.

December Average Humidity in Motosu

This chart illustrates the average monthly humidity levels in Motosu, 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 Motosu is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Motosu

In Motosu 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 Motosu, you can check the information here.

Maximum UV Index Levels in Motosu for December

The chart shows the monthly maximum UV Index (UVI) for Motosu 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 Motosu typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110753
Data source: Motosu 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 Motosu Compares to Other Months

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

This table compares monthly weather conditions in Motosu, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)71 mm (2.8 inches)82%moderate
February Weather4°C (40°F)79 mm (3.1 inches)79%high
March Weather9°C (48°F)179 mm (7.1 inches)74%very high
April Weather13°C (56°F)223 mm (8.8 inches)76%very high
May Weather18°C (65°F)229 mm (9.0 inches)83%extreme
June Weather22°C (71°F)245 mm (9.7 inches)87%extreme
July Weather26°C (78°F)493 mm (19.4 inches)93%extreme
August Weather27°C (82°F)322 mm (12.7 inches)91%extreme
September Weather23°C (74°F)298 mm (11.7 inches)87%very high
October Weather18°C (64°F)234 mm (9.2 inches)85%high
November Weather12°C (53°F)74 mm (2.9 inches)83%moderate
December Weather6°C (43°F)94 mm (3.7 inches)83%moderate

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