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December Weather in Ichihara, Japan

Last updated: August 23, 2025

In December, the average temperature in Ichihara, Japan hovers around 9°C (48°F). Temperatures can swing from a chilly 0°C (33°F) to a mild 20°C (68°F). Expect approximately 80 mm (3.2 in) of precipitation over 8 days, accompanied by an average humidity of 78%.

December Temperature in Ichihara

In December in Ichihara, the average temperature is 9°C (48°F), with maximums reaching 20°C (68°F) and minimums dropping as low as 0°C (33°F). This weather makes it an ideal time for travelers seeking mild climate experiences and outdoor activities.

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

The chart illustrates December temperature patterns in Ichihara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ichihara, December typically has an average temperature of 9°C (48°F), with highs reaching up to 20°C (68°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec434450576671778175665748
Data source: Temperature data for Ichihara 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 Ichihara

In Ichihara in December, the total precipitation amount is 80 mm (3.2 in), occurring over a span of 8 days.

December Precipitation Trends in Ichihara

The chart displays monthly precipitation patterns in Ichihara, 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 Ichihara, December typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec635116213714719022611823231311980
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ichihara

In Ichihara in December humidity is 78%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that clings to your skin, making outdoor excursions less enjoyable as you navigate the damp air.

December Average Humidity in Ichihara

This chart illustrates the average monthly humidity levels in Ichihara, 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 Ichihara is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ichihara

In Ichihara 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 Ichihara, you can check the information here.

Maximum UV Index Levels in Ichihara for December

The chart shows the monthly maximum UV Index (UVI) for Ichihara 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 Ichihara typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119753
Data source: Ichihara 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 Ichihara Compares to Other Months

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

This table compares monthly weather conditions in Ichihara, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)63 mm (2.5 inches)76%moderate
February Weather7°C (44°F)50 mm (2.0 inches)74%moderate
March Weather10°C (50°F)162 mm (6.4 inches)70%high
April Weather14°C (57°F)137 mm (5.4 inches)74%very high
May Weather19°C (66°F)147 mm (5.8 inches)81%very high
June Weather22°C (71°F)190 mm (7.5 inches)88%extreme
July Weather25°C (78°F)226 mm (8.9 inches)93%extreme
August Weather27°C (81°F)118 mm (4.7 inches)90%extreme
September Weather24°C (75°F)232 mm (9.1 inches)86%very high
October Weather19°C (66°F)313 mm (12.3 inches)83%high
November Weather14°C (58°F)119 mm (4.7 inches)80%moderate
December Weather9°C (48°F)80 mm (3.2 inches)78%moderate

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