August Weather in Otsu, Japan

Last updated: August 23, 2025

In August, the average temperature in Otsu, Japan reaches a warm 28°C (82°F). Expect a comfortable minimum of 17°C (63°F) and the occasional peak of 37°C (98°F). With 228 mm (9.0 in) of precipitation spread over 14 days, be prepared for some showers. The overall average humidity sits at a high 91%, contributing to that tropical feel!

August Temperature in Otsu

In August in Otsu, the average temperature is 28°C (82°F). Maximums can reach up to 37°C (98°F), and minimums can drop as low as 17°C (63°F). This climate makes Otsu an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates August temperature patterns in Otsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otsu, August typically has an average temperature of 28°C (82°F), with highs reaching up to 37°C (98°F) and lows dropping to around 17°C (63°F).

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

August Precipitation in Otsu

In Otsu in August, the total precipitation amount is 228 mm (9.0 in) distributed over 14 days.

August Precipitation Trends in Otsu

The chart displays monthly precipitation patterns in Otsu, 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 Otsu, August typically receives around 228 mm (9.0 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Otsu

In Otsu in August humidity is 91%. With an average temperature of 28°C (82°F), this humidity feels like a thick blanket wrapping around you, making each step feel heavy and every breath slightly more laborious, which can be quite challenging for traveling.

August Average Humidity in Otsu

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

In Otsu 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 Otsu.

Maximum UV Index Levels in Otsu for August

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

Data source: Otsu 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 Otsu Compares to Other Months

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

This table compares monthly weather conditions in Otsu, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	56 mm (2.2 inches)	82%	moderate
February Weather	4°C (40°F)	62 mm (2.5 inches)	79%	high
March Weather	9°C (48°F)	125 mm (4.9 inches)	74%	very high
April Weather	13°C (56°F)	157 mm (6.2 inches)	76%	very high
May Weather	18°C (66°F)	154 mm (6.1 inches)	83%	extreme
June Weather	22°C (72°F)	161 mm (6.3 inches)	87%	extreme
July Weather	26°C (79°F)	324 mm (12.7 inches)	93%	extreme
August Weather	28°C (82°F)	228 mm (9.0 inches)	91%	extreme
September Weather	23°C (75°F)	172 mm (6.8 inches)	87%	very high
October Weather	18°C (64°F)	246 mm (9.7 inches)	85%	high
November Weather	12°C (53°F)	47 mm (1.8 inches)	83%	moderate
December Weather	6°C (43°F)	66 mm (2.6 inches)	83%	moderate