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August Weather in Nagaoka, Japan

Last updated: August 23, 2025

In Nagaoka, Japan, the average temperature in August hovers around 27°C (82°F), but temperatures can vary significantly, with minimums reaching 16°C (61°F) and maximums soaring to 40°C (104°F). Be prepared for rain, as the month sees about 186 mm (7.3 in) of precipitation spread over 17 days. With an average humidity of 92%, you'll definitely feel the tropical embrace of this environment!

August Temperature in Nagaoka

In August in Nagaoka, the average temperature is 27°C (82°F), with maximums reaching up to 40°C (104°F) and minimums dropping as low as 16°C (61°F). Be prepared for hot days and cooler evenings while enjoying your travels!

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

The chart illustrates August temperature patterns in Nagaoka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagaoka, August typically has an average temperature of 27°C (82°F), with highs reaching up to 40°C (104°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536471798173625141
Data source: Temperature data for Nagaoka 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 Nagaoka

In Nagaoka in August, the precipitation amount is 186 mm (7.3 in), occurring over the course of 17 days.

August Precipitation Trends in Nagaoka

The chart displays monthly precipitation patterns in Nagaoka, 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 Nagaoka, August typically receives around 186 mm (7.3 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec165138130114110108283186151158139204
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Nagaoka

In Nagaoka in August humidity is 92%. With an average temperature of 27°C (82°F), this humidity feels like a thick, heavy blanket enveloping you, making traveling quite uncomfortable as sweat clings to your skin and every step feels laborious.

August Average Humidity in Nagaoka

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

In Nagaoka 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 Nagaoka.

Maximum UV Index Levels in Nagaoka for August

The chart shows the monthly maximum UV Index (UVI) for Nagaoka 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 Nagaoka typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3479101011119643
Data source: Nagaoka 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 Nagaoka Compares to Other Months

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

This table compares monthly weather conditions in Nagaoka, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)165 mm (6.5 inches)88%moderate
February Weather3°C (38°F)138 mm (5.4 inches)86%moderate
March Weather7°C (45°F)130 mm (5.1 inches)81%high
April Weather12°C (53°F)114 mm (4.5 inches)78%very high
May Weather18°C (64°F)110 mm (4.3 inches)81%very high
June Weather21°C (71°F)108 mm (4.3 inches)88%very high
July Weather26°C (79°F)283 mm (11.2 inches)92%extreme
August Weather27°C (82°F)186 mm (7.3 inches)92%extreme
September Weather23°C (73°F)151 mm (5.9 inches)89%very high
October Weather17°C (63°F)158 mm (6.2 inches)87%high
November Weather11°C (52°F)139 mm (5.5 inches)85%moderate
December Weather5°C (41°F)204 mm (8.0 inches)86%moderate

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