January Weather in Katashina, Japan

Last updated: August 23, 2025

In January, the average temperature in Katashina, Japan hovers around -3°C (27°F), creating a brisk ambiance. Expect some chilly nights, with minimums dropping to -14°C (8°F), while daytime highs can reach up to 8°C (46°F). Be prepared for 80 mm (3.2 in) of precipitation spread across 18 days, and keep in mind the high average humidity of 88%, which adds to the crisp winter feel.

January Temperature in Katashina

In January in Katashina, the average temperature is -3°C (27°F). Maximums can reach 8°C (46°F), while minimums can drop as low as -14°C (8°F). Be prepared for chilly weather and pack warm clothing if you're planning to visit.

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

The chart illustrates January temperature patterns in Katashina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katashina, January typically has an average temperature of -3°C (27°F), with highs reaching up to 8°C (46°F) and lows dropping to around -14°C (8°F).

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

January Precipitation in Katashina

In Katashina in January, the precipitation amount is 80 mm (3.2 in) during 18 days, indicating a relatively wet period for the region.

January Precipitation Trends in Katashina

The chart displays monthly precipitation patterns in Katashina, 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 Katashina, January typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 18 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Katashina

In Katashina in January humidity is 88%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration less inviting as the dampness clings to your clothing and slows your movements.

January Average Humidity in Katashina

This chart illustrates the average monthly humidity levels in Katashina, 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 Katashina 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 Katashina

In Katashina 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 Katashina for better planning.

Maximum UV Index Levels in Katashina for January

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

Data source: Katashina 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 Katashina Compares to Other Months

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

This table compares monthly weather conditions in Katashina, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	80 mm (3.2 inches)	88%	moderate
February Weather	-2°C (29°F)	78 mm (3.1 inches)	86%	high
March Weather	3°C (37°F)	136 mm (5.4 inches)	81%	very high
April Weather	7°C (45°F)	134 mm (5.3 inches)	78%	very high
May Weather	13°C (56°F)	146 mm (5.7 inches)	81%	extreme
June Weather	17°C (62°F)	183 mm (7.2 inches)	88%	extreme
July Weather	21°C (70°F)	294 mm (11.6 inches)	92%	extreme
August Weather	22°C (72°F)	211 mm (8.3 inches)	92%	extreme
September Weather	18°C (64°F)	189 mm (7.5 inches)	89%	very high
October Weather	12°C (54°F)	246 mm (9.7 inches)	87%	high
November Weather	6°C (43°F)	65 mm (2.6 inches)	85%	moderate
December Weather	0°C (32°F)	93 mm (3.7 inches)	86%	moderate