August Weather in Katsuyama, Japan

Last updated: August 23, 2025

In Katsuyama, Japan, the average temperature in August hovers around 24°C (76°F), creating a comfortable climate for visitors. However, be prepared for a range that can dip to a brisk 13°C (55°F) and soar up to a warm 32°C (90°F). Rainfall is quite frequent, with an average precipitation of 304 mm (12.0 in) over 21 days, and the air maintains a high average humidity of 91%. Whether you're exploring the outdoors or enjoying local culture, don't forget your umbrella!

August Temperature in Katsuyama

In August in Katsuyama, the average temperature is 24°C (76°F), with maximums reaching 32°C (90°F) and minimums dipping as low as 13°C (55°F). It’s a great time for travelers to enjoy pleasant weather and explore the outdoors comfortably.

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

The chart illustrates August 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, August typically has an average temperature of 24°C (76°F), with highs reaching up to 32°C (90°F) and lows dropping to around 13°C (55°F).

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

August Precipitation in Katsuyama

In Katsuyama in August, the total precipitation amount is 304 mm (12.0 in), which falls over a span of 21 days.

August Precipitation Trends in Katsuyama

The chart displays monthly precipitation patterns in Katsuyama, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Katsuyama, August typically receives around 304 mm (12.0 inches) of precipitation spread over approximately 21 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Katsuyama

In Katsuyama in August, humidity is 91%. With an average temperature of 24°C (76°F), this humidity feels like walking through a warm, heavy blanket, making travel feel slightly sluggish and demanding extra hydration and breaks to enjoy the sights comfortably.

August Average Humidity in Katsuyama

This chart illustrates the average monthly humidity levels in Katsuyama, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Katsuyama is approximately 91%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Katsuyama

In Katsuyama in August, 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 August

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

Data source: Katsuyama August 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 August 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 August’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 August’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