December Weather in Isesaki, Japan

Last updated: August 23, 2025

In December, the average temperature in Isesaki, Japan hovers around 7°C (44°F), with a minimum dipping to -2°C (29°F) and a maximum reaching up to 19°C (67°F). Expect about 41 mm (1.6 in) of precipitation spread over 5 days, contributing to a high average humidity of 86%. Prepare for a cool and damp month!

December Temperature in Isesaki

In December in Isesaki, the average temperature is 7°C (44°F). Maximum temperatures can reach 19°C (67°F), while minimums can drop as low as -2°C (29°F). Be prepared for a mix of mild days and chilly nights when planning your trip.

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

The chart illustrates December temperature patterns in Isesaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isesaki, December typically has an average temperature of 7°C (44°F), with highs reaching up to 19°C (67°F) and lows dropping to around -2°C (29°F).

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

December Precipitation in Isesaki

In Isesaki in December, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

December Precipitation Trends in Isesaki

The chart displays monthly precipitation patterns in Isesaki, 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 Isesaki, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 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 Isesaki

In Isesaki in December, humidity is 86%. With an average temperature of 7°C (44°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite uninviting.

December Average Humidity in Isesaki

This chart illustrates the average monthly humidity levels in Isesaki, 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 Isesaki is approximately 86%, 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 Isesaki

In Isesaki 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 Isesaki, you can check the information here.

Maximum UV Index Levels in Isesaki for December

The chart shows the monthly maximum UV Index (UVI) for Isesaki 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 Isesaki typically reaches 3, which falls under the moderate exposure category.

Data source: Isesaki 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 Isesaki Compares to Other Months

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

This table compares monthly weather conditions in Isesaki, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	44 mm (1.7 inches)	88%	moderate
February Weather	5°C (42°F)	42 mm (1.7 inches)	86%	moderate
March Weather	9°C (49°F)	115 mm (4.5 inches)	81%	very high
April Weather	14°C (57°F)	117 mm (4.6 inches)	78%	very high
May Weather	19°C (66°F)	124 mm (4.9 inches)	81%	very high
June Weather	22°C (72°F)	160 mm (6.3 inches)	88%	extreme
July Weather	25°C (78°F)	258 mm (10.2 inches)	92%	extreme
August Weather	27°C (82°F)	148 mm (5.8 inches)	92%	extreme
September Weather	23°C (73°F)	194 mm (7.6 inches)	89%	very high
October Weather	18°C (64°F)	260 mm (10.2 inches)	87%	high
November Weather	12°C (54°F)	43 mm (1.7 inches)	85%	moderate
December Weather	7°C (44°F)	41 mm (1.6 inches)	86%	moderate