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December Weather in Chikuma, Japan

Last updated: August 23, 2025

In Chikuma, Japan, the average temperature in December hovers around 0°C (33°F), bringing with it a chill that can drop as low as -11°C (13°F) at times, while occasionally reaching up to 17°C (62°F). This month also sees a substantial precipitation amount of 163 mm (6.4 in) spread over 19 days, making it a wet and often dreary period. Additionally, with an average humidity of 86%, the air tends to feel particularly crisp and damp.

December Temperature in Chikuma

In December in Chikuma, the average temperature is 0°C (33°F). The maximum can reach 17°C (62°F), and the minimum can be as low as -11°C (13°F). It's essential to pack layers and prepare for chilly weather during your travels.

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

The chart illustrates December temperature patterns in Chikuma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chikuma, December typically has an average temperature of 0°C (33°F), with highs reaching up to 17°C (62°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec272838475864727466554332
Data source: Temperature data for Chikuma 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 Chikuma

In Chikuma in December, the precipitation amount is 163 mm (6.4 in), occurring over a span of 19 days.

December Precipitation Trends in Chikuma

The chart displays monthly precipitation patterns in Chikuma, 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 Chikuma, December typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec151138172182227256437276285277119163
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chikuma

In Chikuma in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

December Average Humidity in Chikuma

This chart illustrates the average monthly humidity levels in Chikuma, 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 Chikuma is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chikuma

In Chikuma 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 Chikuma for better planning.

Maximum UV Index Levels in Chikuma for December

The chart shows the monthly maximum UV Index (UVI) for Chikuma 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 Chikuma typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101111111210754
Data source: Chikuma 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 Chikuma Compares to Other Months

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

This table compares monthly weather conditions in Chikuma, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)151 mm (6.0 inches)88%moderate
February Weather-2°C (29°F)138 mm (5.4 inches)86%high
March Weather3°C (38°F)172 mm (6.8 inches)81%very high
April Weather8°C (47°F)182 mm (7.2 inches)78%very high
May Weather14°C (58°F)227 mm (8.9 inches)81%extreme
June Weather18°C (64°F)256 mm (10.1 inches)88%extreme
July Weather22°C (72°F)437 mm (17.2 inches)92%extreme
August Weather23°C (74°F)276 mm (10.9 inches)92%extreme
September Weather19°C (66°F)285 mm (11.2 inches)89%very high
October Weather13°C (55°F)277 mm (10.9 inches)87%high
November Weather6°C (44°F)119 mm (4.7 inches)85%moderate
December Weather0°C (33°F)163 mm (6.4 inches)86%moderate

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