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December Weather in Ajigasawa, Japan

Last updated: August 23, 2025

In Ajigasawa, Japan, the average temperature during December hovers around 2°C (35°F). Expect a chilly climate, with minimum temperatures diving to -7°C (19°F) and maximums reaching up to 13°C (55°F). Be prepared for wet weather, as the area receives an average precipitation of 211 mm (8.3 in) over the course of 27 days, all while maintaining a humidity level of 77%.

December Temperature in Ajigasawa

In December in Ajigasawa, the average temperature is 2°C (35°F). The maximum can reach 13°C (55°F), while the minimum can dip as low as -7°C (19°F). It's advisable to pack warm clothing and be prepared for chilly weather if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Ajigasawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ajigasawa, December typically has an average temperature of 2°C (35°F), with highs reaching up to 13°C (55°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec313138465764727468574635
Data source: Temperature data for Ajigasawa 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 Ajigasawa

In Ajigasawa in December, the total precipitation amount is 211 mm (8.3 in) spread over 27 days.

December Precipitation Trends in Ajigasawa

The chart displays monthly precipitation patterns in Ajigasawa, 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 Ajigasawa, December typically receives around 211 mm (8.3 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec125141121122115139130187144192151211
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ajigasawa

In Ajigasawa in December humidity is 77%. With an average temperature of 2°C (35°F), this humidity feels like a heavy blanket against the skin, making outdoor activities feel far chillier than the thermometer suggests, which can be quite challenging for traveling.

December Average Humidity in Ajigasawa

This chart illustrates the average monthly humidity levels in Ajigasawa, 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 Ajigasawa is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ajigasawa

In Ajigasawa in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Ajigasawa, you can visit Hourly UV Index in Ajigasawa.

Maximum UV Index Levels in Ajigasawa for December

The chart shows the monthly maximum UV Index (UVI) for Ajigasawa 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 Ajigasawa typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891010118642
Data source: Ajigasawa 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 Ajigasawa Compares to Other Months

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

This table compares monthly weather conditions in Ajigasawa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)125 mm (4.9 inches)79%moderate
February Weather0°C (32°F)141 mm (5.6 inches)78%moderate
March Weather3°C (38°F)120 mm (4.7 inches)77%high
April Weather8°C (46°F)122 mm (4.8 inches)78%very high
May Weather14°C (57°F)115 mm (4.5 inches)86%very high
June Weather18°C (64°F)139 mm (5.5 inches)91%very high
July Weather22°C (73°F)130 mm (5.1 inches)95%very high
August Weather24°C (75°F)187 mm (7.4 inches)97%extreme
September Weather20°C (68°F)144 mm (5.7 inches)89%very high
October Weather14°C (58°F)192 mm (7.5 inches)81%high
November Weather8°C (47°F)151 mm (6.0 inches)78%moderate
December Weather2°C (35°F)211 mm (8.3 inches)77%low

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