December Weather in Okawa, Japan

Last updated: August 23, 2025

In December, the average temperature in Okawa, Japan hovers around 7°C (46°F). You can expect a minimum chill of -2°C (28°F), while the mercury might reach a pleasant high of 22°C (72°F). Prepare for some rainy days, as 71 mm (2.8 in) of precipitation is typically spread over 7 days. Don't forget, the average humidity lingers at a comfortable 79%, adding to the region's unique climate.

December Temperature in Okawa

In December in Okawa, the average temperature is 7°C (46°F). Maximum temperatures can reach 22°C (72°F) while minimums can drop as low as -2°C (28°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates December temperature patterns in Okawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Okawa, December typically has an average temperature of 7°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -2°C (28°F).

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

December Precipitation in Okawa

In Okawa in December, the precipitation amount is 71 mm (2.8 in) over a span of 7 days.

December Precipitation Trends in Okawa

The chart displays monthly precipitation patterns in Okawa, 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 Okawa, December typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 7 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 Okawa

In Okawa in December, humidity is 79%. With an average temperature of 7°C (46°F), this humidity feels like a damp chill that seeps into your bones, making any outdoor activity somewhat uncomfortable and urging travelers to dress in layers to stay warm and dry.

December Average Humidity in Okawa

This chart illustrates the average monthly humidity levels in Okawa, 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 Okawa is approximately 79%, 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 Okawa

In Okawa 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 Okawa for better planning.

Maximum UV Index Levels in Okawa for December

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

Data source: Okawa 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 Okawa Compares to Other Months

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

This table compares monthly weather conditions in Okawa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	54 mm (2.1 inches)	75%	moderate
February Weather	7°C (44°F)	85 mm (3.4 inches)	71%	high
March Weather	11°C (52°F)	133 mm (5.2 inches)	71%	very high
April Weather	15°C (59°F)	124 mm (4.9 inches)	78%	extreme
May Weather	20°C (68°F)	200 mm (7.9 inches)	84%	extreme
June Weather	23°C (74°F)	233 mm (9.2 inches)	86%	extreme
July Weather	27°C (80°F)	450 mm (17.7 inches)	92%	extreme
August Weather	28°C (82°F)	331 mm (13.0 inches)	91%	extreme
September Weather	24°C (76°F)	209 mm (8.2 inches)	84%	extreme
October Weather	19°C (66°F)	120 mm (4.7 inches)	83%	high
November Weather	13°C (55°F)	57 mm (2.2 inches)	81%	high
December Weather	7°C (46°F)	71 mm (2.8 inches)	79%	moderate