January Weather in Naganohara, Japan

Last updated: August 23, 2025

In Naganohara, Japan, the average temperature in January hovers around -1°C (30°F), with minimums dipping to -11°C (12°F) and maximums reaching 10°C (50°F). Expect precipitation of 78 mm (3.1 in) spread across about 17 days, contributing to an average humidity level of 88%. Stay warm and prepared for the chilly, damp conditions!

January Temperature in Naganohara

In January in Naganohara, the average temperature is -1°C (30°F). The maximum can reach 10°C (50°F), while the minimum can drop to as low as -11°C (12°F). Be prepared for chilly weather and pack accordingly if you're planning to travel during this time.

January Weather in Naganohara: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Naganohara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naganohara, January typically has an average temperature of -1°C (30°F), with highs reaching up to 10°C (50°F) and lows dropping to around -11°C (12°F).

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

January Precipitation in Naganohara

In Naganohara in January, the precipitation amount is 78 mm (3.1 in) over a span of 17 days.

January Precipitation Trends in Naganohara

The chart displays monthly precipitation patterns in Naganohara, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Naganohara, January typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Naganohara

In Naganohara in January humidity is 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

January Average Humidity in Naganohara

This chart illustrates the average monthly humidity levels in Naganohara, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Naganohara is approximately 88%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Naganohara

In Naganohara in January, 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 Naganohara for better planning.

Maximum UV Index Levels in Naganohara for January

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

Data source: Naganohara January 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 January Weather in Naganohara Compares to Other Months

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

This table compares monthly weather conditions in Naganohara, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	78 mm (3.1 inches)	88%	moderate
February Weather	0°C (32°F)	72 mm (2.8 inches)	86%	high
March Weather	4°C (40°F)	125 mm (4.9 inches)	81%	very high
April Weather	9°C (48°F)	130 mm (5.1 inches)	78%	very high
May Weather	15°C (59°F)	173 mm (6.8 inches)	81%	extreme
June Weather	18°C (64°F)	223 mm (8.8 inches)	88%	extreme
July Weather	22°C (72°F)	341 mm (13.4 inches)	92%	extreme
August Weather	23°C (74°F)	244 mm (9.6 inches)	92%	extreme
September Weather	19°C (66°F)	222 mm (8.7 inches)	89%	very high
October Weather	13°C (56°F)	264 mm (10.4 inches)	87%	high
November Weather	7°C (45°F)	54 mm (2.1 inches)	85%	moderate
December Weather	2°C (35°F)	74 mm (2.9 inches)	86%	moderate