December Weather in Hayakawa, Japan

Last updated: August 23, 2025

In December, the average temperature in Hayakawa, Japan hovers around 2°C (35°F), with a minimum dipping to -10°C (13°F) and reaching a maximum of 16°C (62°F). Expect 77 mm (3.0 in) of precipitation spread over 8 days, contributing to an average humidity of 78%. Embrace the cool, crisp atmosphere that this season brings!

December Temperature in Hayakawa

In December in Hayakawa, the average temperature is 2°C (35°F), with maximums reaching 16°C (62°F) and minimums dipping as low as -10°C (13°F). It's a great time to pack warm clothing and prepare for a range of weather conditions while exploring the area's winter charm.

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

The chart illustrates December temperature patterns in Hayakawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayakawa, December typically has an average temperature of 2°C (35°F), with highs reaching up to 16°C (62°F) and lows dropping to around -10°C (13°F).

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

December Precipitation in Hayakawa

In Hayakawa in December, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

December Precipitation Trends in Hayakawa

The chart displays monthly precipitation patterns in Hayakawa, 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 Hayakawa, December typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 8 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 Hayakawa

In Hayakawa in December humidity is 78%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

December Average Humidity in Hayakawa

This chart illustrates the average monthly humidity levels in Hayakawa, 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 Hayakawa is approximately 78%, 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 Hayakawa

In Hayakawa 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 Hayakawa for better planning.

Maximum UV Index Levels in Hayakawa for December

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

Data source: Hayakawa 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 Hayakawa Compares to Other Months

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

This table compares monthly weather conditions in Hayakawa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	65 mm (2.6 inches)	76%	moderate
February Weather	0°C (32°F)	80 mm (3.1 inches)	74%	high
March Weather	4°C (40°F)	182 mm (7.2 inches)	70%	very high
April Weather	9°C (48°F)	179 mm (7.0 inches)	74%	very high
May Weather	14°C (57°F)	191 mm (7.5 inches)	81%	extreme
June Weather	17°C (63°F)	222 mm (8.7 inches)	88%	extreme
July Weather	21°C (70°F)	451 mm (17.8 inches)	93%	extreme
August Weather	23°C (73°F)	227 mm (8.9 inches)	90%	extreme
September Weather	19°C (66°F)	243 mm (9.6 inches)	86%	very high
October Weather	13°C (56°F)	330 mm (13.0 inches)	83%	high
November Weather	7°C (45°F)	80 mm (3.1 inches)	80%	high
December Weather	2°C (35°F)	77 mm (3.0 inches)	78%	moderate