February Weather in Joetsu, Japan

Last updated: August 23, 2025

In February, the average temperature in Joetsu, Japan hovers around 4°C (39°F). During this time, temperatures can dip as low as -4°C (25°F), while occasionally reaching a pleasant 17°C (63°F). Expect significant rainfall, with 181 mm (7.1 in) of precipitation spread across 21 days, and be prepared for high humidity levels at 86%.

February Temperature in Joetsu

In February in Joetsu, the average temperature is 4°C (39°F). Maximum temperatures can reach 17°C (63°F), while the minimum can drop as low as -4°C (25°F). Travelers should be prepared for chilly weather with a chance of warmer afternoons, making layers essential for comfort.

February Weather in Joetsu: Daily Temperature Highs, Lows, and Averages

The chart illustrates February temperature patterns in Joetsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joetsu, February typically has an average temperature of 4°C (39°F), with highs reaching up to 17°C (63°F) and lows dropping to around -4°C (25°F).

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

February Precipitation in Joetsu

In Joetsu in February, the precipitation amount is 181 mm (7.1 in) over the course of 21 days.

February Precipitation Trends in Joetsu

The chart displays monthly precipitation patterns in Joetsu, with values for each month alongside February’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how February’s conditions compare to those of other months. In Joetsu, February typically receives around 181 mm (7.1 inches) of precipitation spread over approximately 21 days.

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

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Millimeters (mm) Inches (in)

February Humidity in Joetsu

In Joetsu in February humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.

February Average Humidity in Joetsu

This chart illustrates the average monthly humidity levels in Joetsu, with February’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In February, average humidity in Joetsu is approximately 86%, offering insight into how humid the weather typically is during this month.

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

February UV Index in Joetsu

In Joetsu in February, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Joetsu.

Maximum UV Index Levels in Joetsu for February

The chart shows the monthly maximum UV Index (UVI) for Joetsu in February, 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 February, the maximum UV index in Joetsu typically reaches 5, which falls under the moderate exposure category.

Data source: Joetsu February 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 February Weather in Joetsu Compares to Other Months

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

This table compares monthly weather conditions in Joetsu, showing how February’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	233 mm (9.2 inches)	88%	moderate
February Weather	4°C (39°F)	181 mm (7.1 inches)	86%	moderate
March Weather	8°C (46°F)	128 mm (5.0 inches)	81%	very high
April Weather	12°C (53°F)	121 mm (4.7 inches)	78%	very high
May Weather	17°C (64°F)	105 mm (4.1 inches)	81%	very high
June Weather	21°C (70°F)	105 mm (4.1 inches)	88%	extreme
July Weather	26°C (79°F)	290 mm (11.4 inches)	92%	extreme
August Weather	27°C (82°F)	157 mm (6.2 inches)	92%	extreme
September Weather	23°C (74°F)	171 mm (6.7 inches)	89%	very high
October Weather	18°C (64°F)	190 mm (7.5 inches)	87%	high
November Weather	12°C (53°F)	170 mm (6.7 inches)	85%	moderate
December Weather	6°C (43°F)	273 mm (10.7 inches)	86%	moderate