August Weather in Iwaki, Japan

Last updated: August 23, 2025

In Iwaki, Japan, the average temperature in August is a comfortable 25°C (76°F). However, temperatures can range from a minimum of 18°C (65°F) to a pleasant maximum of 30°C (87°F). Be prepared for some rain as 137 mm (5.4 in) of precipitation usually falls over 13 days during this month, accompanied by high humidity levels of 90%. Whether you're seeking warmth or a refreshing drizzle, Iwaki has something to offer!

August Temperature in Iwaki

In August in Iwaki, the average temperature is 25°C (76°F). The maximum can reach 30°C (87°F), while the minimum can be as low as 18°C (65°F). This pleasant climate makes it an ideal time for outdoor activities and sightseeing.

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

The chart illustrates August temperature patterns in Iwaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iwaki, August typically has an average temperature of 25°C (76°F), with highs reaching up to 30°C (87°F) and lows dropping to around 18°C (65°F).

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

August Precipitation in Iwaki

In Iwaki in August, the total precipitation amount reaches 137 mm (5.4 in) over the course of 13 days.

August Precipitation Trends in Iwaki

The chart displays monthly precipitation patterns in Iwaki, 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 Iwaki, August typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 13 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 Iwaki

In Iwaki in August humidity is 90%. With an average temperature of 25°C (76°F), this humidity feels like walking through a warm blanket, making travel feel heavy and sticky while draining your energy quickly.

August Average Humidity in Iwaki

This chart illustrates the average monthly humidity levels in Iwaki, 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 Iwaki is approximately 90%, 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 Iwaki

In Iwaki 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 Iwaki.

Maximum UV Index Levels in Iwaki for August

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

Data source: Iwaki 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 Iwaki Compares to Other Months

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

This table compares monthly weather conditions in Iwaki, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	57 mm (2.2 inches)	76%	moderate
February Weather	6°C (42°F)	45 mm (1.8 inches)	75%	moderate
March Weather	8°C (47°F)	169 mm (6.6 inches)	72%	high
April Weather	11°C (53°F)	136 mm (5.4 inches)	73%	very high
May Weather	16°C (61°F)	154 mm (6.1 inches)	80%	very high
June Weather	19°C (66°F)	136 mm (5.3 inches)	87%	very high
July Weather	22°C (72°F)	202 mm (8.0 inches)	92%	extreme
August Weather	25°C (76°F)	137 mm (5.4 inches)	90%	extreme
September Weather	22°C (72°F)	186 mm (7.3 inches)	84%	very high
October Weather	18°C (64°F)	271 mm (10.7 inches)	80%	high
November Weather	13°C (55°F)	85 mm (3.4 inches)	77%	moderate
December Weather	8°C (46°F)	73 mm (2.9 inches)	77%	moderate