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August Weather in Iiyama, Japan

Last updated: August 23, 2025

In Iiyama, Japan, the average temperature in August is a pleasant 24°C (75°F). However, temperatures can vary significantly, dropping to a minimum of 11°C (52°F) and soaring to a maximum of 35°C (95°F). Expect frequent rain, with precipitation amounting to 198 mm (7.8 in) over the course of 23 days. This period also boasts a high average humidity of 92%, adding to the tropical feel of the region.

August Temperature in Iiyama

In August, in Iiyama, the average temperature is 24°C (75°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop to as low as 11°C (52°F). This makes Iiyama a pleasant destination for travelers seeking warm weather with a variety of temperature experiences.

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

The chart illustrates August temperature patterns in Iiyama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iiyama, August typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec293038485965727566564434
Data source: Temperature data for Iiyama generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Iiyama

In Iiyama in August, the precipitation amount is 198 mm (7.8 in) over the course of 23 days.

August Precipitation Trends in Iiyama

The chart displays monthly precipitation patterns in Iiyama, 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 Iiyama, August typically receives around 198 mm (7.8 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec14412913314116017134119819421794151
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Iiyama

In Iiyama in August humidity is 92%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket enveloping you, making travel sticky and uncomfortable, and each step feels heavier as the air clings to your skin.

August Average Humidity in Iiyama

This chart illustrates the average monthly humidity levels in Iiyama, 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 Iiyama is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Iiyama

In Iiyama 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 Iiyama.

Maximum UV Index Levels in Iiyama for August

The chart shows the monthly maximum UV Index (UVI) for Iiyama 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 Iiyama typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46991111111110753
Data source: Iiyama 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 Iiyama Compares to Other Months

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

This table compares monthly weather conditions in Iiyama, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)144 mm (5.7 inches)88%moderate
February Weather-1°C (30°F)129 mm (5.1 inches)86%high
March Weather4°C (39°F)133 mm (5.2 inches)81%very high
April Weather9°C (48°F)141 mm (5.5 inches)78%very high
May Weather15°C (59°F)160 mm (6.3 inches)81%extreme
June Weather18°C (65°F)171 mm (6.7 inches)88%extreme
July Weather22°C (73°F)341 mm (13.4 inches)92%extreme
August Weather24°C (75°F)198 mm (7.8 inches)92%extreme
September Weather19°C (67°F)194 mm (7.6 inches)89%very high
October Weather13°C (56°F)217 mm (8.5 inches)87%high
November Weather7°C (44°F)94 mm (3.7 inches)85%moderate
December Weather1°C (34°F)151 mm (6.0 inches)86%moderate

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