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December Weather in Aka, Japan

Last updated: August 23, 2025

In December, the average temperature in Aka, Japan hovers around 7°C (45°F). Expect a chilly minimum of -2°C (28°F) and a warm maximum of 22°C (72°F). Throughout the month, anticipate 61 mm (2.4 in) of precipitation spread over 7 days. The average humidity sits at a comfortable 79%, offering a refreshing atmosphere.

December Temperature in Aka

In December in Aka, the average temperature is 7°C (45°F). Maximums can reach 22°C (72°F), and minimums can be as low as -2°C (28°F). This variation in temperature suggests that travelers should pack both warm and light clothing to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Aka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aka, December typically has an average temperature of 7°C (45°F), with highs reaching up to 22°C (72°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec424452596874808375665545
Data source: Temperature data for Aka 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 Aka

In Aka in December, the precipitation amount is 61 mm (2.4 in) over the course of 7 days.

December Precipitation Trends in Aka

The chart displays monthly precipitation patterns in Aka, 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 Aka, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec53751171121622003562691891155062
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Aka

In Aka in December humidity is 79%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill wrapping around you, making outdoor explorations uncomfortable and requiring extra layers for warmth while you navigate through the misty air.

December Average Humidity in Aka

This chart illustrates the average monthly humidity levels in Aka, 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 Aka is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%71%78%84%86%92%91%84%83%81%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aka

In Aka 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 Aka for better planning.

Maximum UV Index Levels in Aka for December

The chart shows the monthly maximum UV Index (UVI) for Aka 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 Aka typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121211764
Data source: Aka 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 Aka Compares to Other Months

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

This table compares monthly weather conditions in Aka, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)53 mm (2.1 inches)75%moderate
February Weather7°C (44°F)75 mm (2.9 inches)71%high
March Weather11°C (52°F)117 mm (4.6 inches)71%very high
April Weather15°C (59°F)112 mm (4.4 inches)78%extreme
May Weather20°C (68°F)162 mm (6.4 inches)84%extreme
June Weather23°C (74°F)200 mm (7.9 inches)86%extreme
July Weather27°C (80°F)356 mm (14.0 inches)92%extreme
August Weather28°C (83°F)269 mm (10.6 inches)91%extreme
September Weather24°C (76°F)189 mm (7.4 inches)84%extreme
October Weather19°C (66°F)115 mm (4.5 inches)83%high
November Weather13°C (55°F)50 mm (1.9 inches)81%high
December Weather7°C (45°F)61 mm (2.4 inches)79%moderate

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