December Weather in Shimoichi, Japan

Last updated: August 23, 2025

In December, the average temperature in Shimoichi, Japan hovers around 4°C (40°F). Expect chilly days where the minimum temperature can plummet to -6°C (21°F), while warm spells could see highs of 20°C (68°F). With an average precipitation of 88 mm (3.5 in) spread across 11 days, and an average humidity of 83%, be prepared for a moist atmosphere.

December Temperature in Shimoichi

In December in Shimoichi, the average temperature is 4°C (40°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop as low as -6°C (21°F). This variation makes Shimoichi ideal for those who enjoy experiencing a range of seasonal weather.

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

The chart illustrates December temperature patterns in Shimoichi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shimoichi, December typically has an average temperature of 4°C (40°F), with highs reaching up to 20°C (68°F) and lows dropping to around -6°C (21°F).

Data source: Temperature data for Shimoichi generated using information from the Copernicus Climate Change Service.

December Precipitation in Shimoichi

In Shimoichi in December, the total precipitation amount is 88 mm (3.5 in) spread over 11 days.

December Precipitation Trends in Shimoichi

The chart displays monthly precipitation patterns in Shimoichi, 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 Shimoichi, December typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Shimoichi

In Shimoichi in December humidity is 83%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring you to bundle up while bracing against the heavy, cold air.

December Average Humidity in Shimoichi

This chart illustrates the average monthly humidity levels in Shimoichi, 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 Shimoichi is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Shimoichi

In Shimoichi 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 Shimoichi for better planning.

Maximum UV Index Levels in Shimoichi for December

The chart shows the monthly maximum UV Index (UVI) for Shimoichi 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 Shimoichi typically reaches 4, which falls under the moderate exposure category.

Data source: Shimoichi 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 Shimoichi Compares to Other Months

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

This table compares monthly weather conditions in Shimoichi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	78 mm (3.1 inches)	82%	moderate
February Weather	3°C (37°F)	93 mm (3.6 inches)	79%	high
March Weather	7°C (46°F)	152 mm (6.0 inches)	74%	very high
April Weather	12°C (54°F)	147 mm (5.8 inches)	76%	extreme
May Weather	17°C (63°F)	191 mm (7.5 inches)	83%	extreme
June Weather	20°C (68°F)	267 mm (10.5 inches)	87%	extreme
July Weather	24°C (76°F)	398 mm (15.7 inches)	93%	extreme
August Weather	26°C (78°F)	251 mm (9.9 inches)	91%	extreme
September Weather	22°C (71°F)	241 mm (9.5 inches)	87%	very high
October Weather	16°C (61°F)	313 mm (12.3 inches)	85%	high
November Weather	10°C (50°F)	66 mm (2.6 inches)	83%	high
December Weather	4°C (40°F)	88 mm (3.5 inches)	83%	moderate