January Weather in Narashino, Japan

Last updated: August 23, 2025

In Narashino, Japan, the average temperature in January is a brisk 5°C (41°F), with a minimum dipping to -7°C (20°F) and a maximum reaching 17°C (63°F). During this time, you can expect 49 mm (1.9 in) of precipitation over 5 days, accompanied by an average humidity level of 76%. Stay prepared!

January Temperature in Narashino

In January in Narashino, the average temperature is 5°C (41°F). Maximums can reach 17°C (63°F), while minimums can drop as low as -7°C (20°F). Travelers should be prepared for chilly and variable weather conditions, so packing layers is essential.

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

The chart illustrates January temperature patterns in Narashino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Narashino, January typically has an average temperature of 5°C (41°F), with highs reaching up to 17°C (63°F) and lows dropping to around -7°C (20°F).

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

January Precipitation in Narashino

In Narashino in January, the precipitation amount is 49 mm (1.9 in) spread over a period of 5 days.

January Precipitation Trends in Narashino

The chart displays monthly precipitation patterns in Narashino, 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 Narashino, January typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 5 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 Narashino

In Narashino in January humidity is 76%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and prompting travelers to seek shelter or warm layers.

January Average Humidity in Narashino

This chart illustrates the average monthly humidity levels in Narashino, 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 Narashino is approximately 76%, 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 Narashino

In Narashino in January, 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 Narashino, you can check the information here.

Maximum UV Index Levels in Narashino for January

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

Data source: Narashino 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 Narashino Compares to Other Months

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

This table compares monthly weather conditions in Narashino, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	49 mm (1.9 inches)	76%	moderate
February Weather	6°C (44°F)	43 mm (1.7 inches)	74%	moderate
March Weather	10°C (51°F)	134 mm (5.3 inches)	70%	high
April Weather	14°C (58°F)	116 mm (4.6 inches)	74%	very high
May Weather	19°C (67°F)	125 mm (4.9 inches)	81%	very high
June Weather	22°C (72°F)	160 mm (6.3 inches)	88%	extreme
July Weather	26°C (79°F)	224 mm (8.8 inches)	93%	extreme
August Weather	28°C (82°F)	105 mm (4.1 inches)	90%	extreme
September Weather	24°C (75°F)	192 mm (7.6 inches)	86%	very high
October Weather	19°C (66°F)	261 mm (10.3 inches)	83%	high
November Weather	13°C (56°F)	90 mm (3.5 inches)	80%	moderate
December Weather	8°C (46°F)	64 mm (2.5 inches)	78%	moderate