June Weather in Katsuyama, Japan

Last updated: August 23, 2025

In Katsuyama, Japan, the average temperature in June hovers around 18°C (65°F), with a minimum dipping to 7°C (45°F) and a maximum soaring to 27°C (81°F). Expect abundant rainfall during this period, with an average precipitation of 226 mm (8.9 in) spread over 14 days. Plus, the air tends to be quite humid, boasting an average humidity level of 87%. Prepare accordingly for a mix of warm weather and wet days!

June Temperature in Katsuyama

In June in Katsuyama, the average temperature is 18°C (65°F). The maximum can reach 27°C (81°F), and the minimum can be as low as 7°C (45°F). This pleasant range makes it an ideal time for travelers seeking mild weather and outdoor activities.

June Weather in Katsuyama: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Katsuyama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katsuyama, June typically has an average temperature of 18°C (65°F), with highs reaching up to 27°C (81°F) and lows dropping to around 7°C (45°F).

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

June Precipitation in Katsuyama

In Katsuyama in June, the total precipitation amount is 226 mm (8.9 in) over a span of 14 days.

June Precipitation Trends in Katsuyama

The chart displays monthly precipitation patterns in Katsuyama, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Katsuyama, June typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Katsuyama

In Katsuyama in June, humidity is 87%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket wrapped around you, making travel feel both stifling and sticky, and leaving you longing for moments of refreshing shade or air conditioning.

June Average Humidity in Katsuyama

This chart illustrates the average monthly humidity levels in Katsuyama, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Katsuyama is approximately 87%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Katsuyama

In Katsuyama in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Katsuyama.

Maximum UV Index Levels in Katsuyama for June

The chart shows the monthly maximum UV Index (UVI) for Katsuyama in June, 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 June, the maximum UV index in Katsuyama typically reaches 11, which falls under the extreme exposure category.

Data source: Katsuyama June 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 June Weather in Katsuyama Compares to Other Months

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

This table compares monthly weather conditions in Katsuyama, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	165 mm (6.5 inches)	82%	moderate
February Weather	-1°C (31°F)	167 mm (6.6 inches)	79%	high
March Weather	4°C (40°F)	191 mm (7.5 inches)	74%	very high
April Weather	9°C (49°F)	216 mm (8.5 inches)	76%	very high
May Weather	15°C (59°F)	201 mm (7.9 inches)	83%	extreme
June Weather	18°C (65°F)	226 mm (8.9 inches)	87%	extreme
July Weather	23°C (73°F)	436 mm (17.2 inches)	93%	extreme
August Weather	24°C (76°F)	304 mm (12.0 inches)	91%	extreme
September Weather	20°C (68°F)	244 mm (9.6 inches)	87%	very high
October Weather	14°C (58°F)	230 mm (9.1 inches)	85%	high
November Weather	8°C (46°F)	127 mm (5.0 inches)	83%	moderate
December Weather	2°C (36°F)	195 mm (7.7 inches)	83%	moderate