August Weather in Omachi, Japan

Last updated: August 23, 2025

In August, the average temperature in Omachi, Japan is a pleasant 20°C (69°F). However, you can expect a range, with lows dipping to 8°C (47°F) and highs soaring to 29°C (84°F). Prepare for a wet month, as 400 mm (15.8 in) of precipitation is spread over about 25 days, contributing to an average humidity of a steamy 92%.

August Temperature in Omachi

In August in Omachi, the average temperature is 20°C (69°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 8°C (47°F). This mild climate makes Omachi an ideal destination for travelers who enjoy comfortable outdoor activities and sightseeing.

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

The chart illustrates August temperature patterns in Omachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omachi, August typically has an average temperature of 20°C (69°F), with highs reaching up to 29°C (84°F) and lows dropping to around 8°C (47°F).

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

August Precipitation in Omachi

In Omachi in August, the precipitation amount is 400 mm (15.8 in) spread over 25 days, indicating a significant level of rainfall during that period.

August Precipitation Trends in Omachi

The chart displays monthly precipitation patterns in Omachi, 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 Omachi, August typically receives around 400 mm (15.8 inches) of precipitation spread over approximately 25 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 Omachi

In Omachi in August humidity is 92%. With average temperature 20°C (69°F), this humidity feels like a thick blanket enveloping you, making travel feel sluggish and sticky, as sweat clings to your skin and every step feels heavier under the oppressive weight of the moist air.

August Average Humidity in Omachi

This chart illustrates the average monthly humidity levels in Omachi, 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 Omachi is approximately 92%, 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 Omachi

In Omachi in August, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Omachi.

Maximum UV Index Levels in Omachi for August

The chart shows the monthly maximum UV Index (UVI) for Omachi 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 Omachi typically reaches 12, which falls under the extreme exposure category.

Data source: Omachi 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 Omachi Compares to Other Months

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

This table compares monthly weather conditions in Omachi, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	193 mm (7.6 inches)	88%	moderate
February Weather	-7°C (20°F)	181 mm (7.1 inches)	86%	high
March Weather	-1°C (30°F)	198 mm (7.8 inches)	81%	very high
April Weather	4°C (39°F)	226 mm (8.9 inches)	78%	very high
May Weather	11°C (52°F)	276 mm (10.9 inches)	81%	extreme
June Weather	15°C (59°F)	310 mm (12.2 inches)	88%	extreme
July Weather	19°C (67°F)	565 mm (22.3 inches)	92%	extreme
August Weather	20°C (69°F)	400 mm (15.8 inches)	92%	extreme
September Weather	16°C (61°F)	334 mm (13.1 inches)	89%	very high
October Weather	10°C (50°F)	284 mm (11.2 inches)	87%	high
November Weather	3°C (37°F)	139 mm (5.5 inches)	85%	moderate
December Weather	-5°C (24°F)	206 mm (8.1 inches)	86%	moderate