nomadseason

December Weather in Aioi, Japan

Last updated: August 23, 2025

In December, the average temperature in Aioi, Japan hovers around 9°C (49°F). You can expect minimums of 1°C (34°F) and maximums reaching 19°C (66°F). During this time, the area experiences approximately 56 mm (2.2 in) of precipitation over about 7 days, contributing to an average humidity of a comfortable 82%.

December Temperature in Aioi

In December in Aioi, the average temperature is 9°C (49°F). Maximum temperatures can reach 19°C (66°F), while minimums can dip as low as 1°C (34°F). It's advisable to pack layers to stay comfortable while exploring.

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

The chart illustrates December temperature patterns in Aioi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aioi, December typically has an average temperature of 9°C (49°F), with highs reaching up to 19°C (66°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec444349556470788176675848
Data source: Temperature data for Aioi generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Aioi

In Aioi in December, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.

December Precipitation Trends in Aioi

The chart displays monthly precipitation patterns in Aioi, 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 Aioi, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec42551101321341603091802282294356
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Aioi

In Aioi in December, humidity is 82%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and prompting travelers to seek warmth indoors or in cozy cafes.

December Average Humidity in Aioi

This chart illustrates the average monthly humidity levels in Aioi, 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 Aioi is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aioi

In Aioi 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 Aioi for better planning.

Maximum UV Index Levels in Aioi for December

The chart shows the monthly maximum UV Index (UVI) for Aioi 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 Aioi typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121110754
Data source: Aioi 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 Aioi Compares to Other Months

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

This table compares monthly weather conditions in Aioi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)42 mm (1.7 inches)82%moderate
February Weather6°C (44°F)55 mm (2.2 inches)79%moderate
March Weather9°C (49°F)109 mm (4.3 inches)73%very high
April Weather13°C (56°F)132 mm (5.2 inches)74%extreme
May Weather18°C (64°F)134 mm (5.3 inches)84%extreme
June Weather21°C (71°F)160 mm (6.3 inches)86%extreme
July Weather25°C (78°F)309 mm (12.2 inches)92%extreme
August Weather27°C (81°F)180 mm (7.1 inches)92%extreme
September Weather24°C (76°F)228 mm (9.0 inches)87%very high
October Weather20°C (68°F)229 mm (9.0 inches)85%high
November Weather14°C (58°F)43 mm (1.7 inches)84%moderate
December Weather9°C (49°F)56 mm (2.2 inches)82%moderate

Compare Aioi's Climate with Cities Worldwide