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August Weather in Shiojiri, Japan

Last updated: August 23, 2025

The average temperature in Shiojiri, Japan during August is a pleasant 23°C (74°F). Expect a range with minimums dipping to 12°C (53°F) and maximums soaring to 33°C (92°F). However, be prepared for some rain, as 151 mm (5.9 in) of precipitation typically falls over 16 days in this month. With an average humidity level of 90%, it’s a good idea to stay hydrated and embrace the lush, vibrant atmosphere!

August Temperature in Shiojiri

In August in Shiojiri, the average temperature is 23°C (74°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 12°C (53°F). This makes Shiojiri an ideal destination for travelers seeking pleasant weather and a range of outdoor activities.

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

The chart illustrates August temperature patterns in Shiojiri, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shiojiri, August typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (92°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec293040485864727466564434
Data source: Temperature data for Shiojiri 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 Shiojiri

In Shiojiri in August, the precipitation amount is 151 mm (5.9 in) over a span of 16 days.

August Precipitation Trends in Shiojiri

The chart displays monthly precipitation patterns in Shiojiri, 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 Shiojiri, August typically receives around 151 mm (5.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec75811411441551492891511712376684
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Shiojiri

In Shiojiri in August humidity is 90%. With an average temperature of 23°C (74°F), this humidity feels like traveling through a warm, heavy blanket that clings to your skin, making every step feel sluggish and every breath a reminder of the tropical atmosphere surrounding you.

August Average Humidity in Shiojiri

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

In Shiojiri 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 Shiojiri.

Maximum UV Index Levels in Shiojiri for August

The chart shows the monthly maximum UV Index (UVI) for Shiojiri 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 Shiojiri typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101111121210754
Data source: Shiojiri 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 Shiojiri Compares to Other Months

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

This table compares monthly weather conditions in Shiojiri, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)75 mm (3.0 inches)76%moderate
February Weather-1°C (30°F)80 mm (3.2 inches)74%high
March Weather4°C (40°F)141 mm (5.6 inches)70%very high
April Weather9°C (48°F)143 mm (5.6 inches)74%very high
May Weather15°C (58°F)155 mm (6.1 inches)81%extreme
June Weather18°C (65°F)149 mm (5.8 inches)88%extreme
July Weather22°C (72°F)289 mm (11.4 inches)93%extreme
August Weather23°C (74°F)151 mm (5.9 inches)90%extreme
September Weather19°C (66°F)171 mm (6.7 inches)86%very high
October Weather13°C (56°F)237 mm (9.3 inches)83%high
November Weather7°C (44°F)66 mm (2.6 inches)80%moderate
December Weather1°C (34°F)84 mm (3.3 inches)78%moderate

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