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August Weather in Iruma, Japan

Last updated: August 23, 2025

In Iruma, Japan, the average temperature in August hovers around 26°C (79°F), making it a warm destination. However, temperatures can vary significantly, with a minimum of 15°C (59°F) and a maximum reaching up to 36°C (97°F). Expect 195 mm (7.7 in) of precipitation spread over 23 days, contributing to an average humidity of a high 90%.

August Temperature in Iruma

In August in Iruma, the average temperature is 26°C (79°F). Maximums can reach 36°C (97°F), while minimums can drop to as low as 15°C (59°F). This weather makes it an ideal time for travelers seeking warm days and cool evenings.

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

The chart illustrates August temperature patterns in Iruma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iruma, August typically has an average temperature of 26°C (79°F), with highs reaching up to 36°C (97°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec373946546368757971615242
Data source: Temperature data for Iruma 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 Iruma

In Iruma in August, the precipitation amount is 195 mm (7.7 in) spread over 23 days, indicating a significant amount of rainfall for that period.

August Precipitation Trends in Iruma

The chart displays monthly precipitation patterns in Iruma, 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 Iruma, August typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec53621661501482093121952473467262
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Iruma

In Iruma in August, humidity is 90%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making travel feel sticky and draining, while every step requires extra effort in the sweltering embrace of the moist air.

August Average Humidity in Iruma

This chart illustrates the average monthly humidity levels in Iruma, 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 Iruma is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Iruma

In Iruma 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 Iruma.

Maximum UV Index Levels in Iruma for August

The chart shows the monthly maximum UV Index (UVI) for Iruma 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 Iruma typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46891111111110754
Data source: Iruma 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 Iruma Compares to Other Months

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

This table compares monthly weather conditions in Iruma, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)53 mm (2.1 inches)76%moderate
February Weather4°C (40°F)62 mm (2.4 inches)74%high
March Weather8°C (47°F)166 mm (6.5 inches)70%very high
April Weather12°C (54°F)150 mm (5.9 inches)74%very high
May Weather17°C (64°F)148 mm (5.8 inches)81%extreme
June Weather20°C (69°F)209 mm (8.2 inches)88%extreme
July Weather24°C (76°F)312 mm (12.3 inches)93%extreme
August Weather26°C (79°F)195 mm (7.7 inches)90%extreme
September Weather22°C (71°F)247 mm (9.7 inches)86%very high
October Weather16°C (61°F)346 mm (13.6 inches)83%high
November Weather11°C (52°F)72 mm (2.8 inches)80%moderate
December Weather5°C (42°F)62 mm (2.4 inches)78%moderate

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