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September Weather in Shizukuishi, Japan

Last updated: August 23, 2025

In September, the average temperature in Shizukuishi, Japan hovers around 18°C (65°F). Expect a wide range, with minimums dipping to 4°C (39°F) and maximums soaring to 31°C (88°F). Be prepared for some rain, as precipitation amounts reach 138 mm (5.4 in) over approximately 15 days, contributing to an average humidity of 86%.

September Temperature in Shizukuishi

In September, in Shizukuishi, the average temperature is 18°C (65°F). Maximum temperatures can reach 31°C (88°F), while the minimum can drop as low as 4°C (39°F). Overall, it's a great time to travel and experience a pleasant mix of warm days and cooler nights.

September Weather in Shizukuishi: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Shizukuishi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shizukuishi, September typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (88°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec242634445662707264534129
Data source: Temperature data for Shizukuishi 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.

September Precipitation in Shizukuishi

In Shizukuishi in September, the total precipitation amount is 138 mm (5.4 in) recorded over the course of 15 days.

September Precipitation Trends in Shizukuishi

The chart displays monthly precipitation patterns in Shizukuishi, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Shizukuishi, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec84112121143120139192184138166103122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Shizukuishi

In Shizukuishi in September humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.

September Average Humidity in Shizukuishi

This chart illustrates the average monthly humidity levels in Shizukuishi, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Shizukuishi is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Shizukuishi

In Shizukuishi in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Shizukuishi.

Maximum UV Index Levels in Shizukuishi for September

The chart shows the monthly maximum UV Index (UVI) for Shizukuishi in September, 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 September, the maximum UV index in Shizukuishi typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346991010119643
Data source: Shizukuishi September 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 September Weather in Shizukuishi Compares to Other Months

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

This table compares monthly weather conditions in Shizukuishi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)84 mm (3.3 inches)80%moderate
February Weather-4°C (26°F)112 mm (4.4 inches)79%moderate
March Weather1°C (34°F)120 mm (4.7 inches)77%high
April Weather7°C (44°F)143 mm (5.6 inches)75%very high
May Weather13°C (56°F)120 mm (4.7 inches)80%very high
June Weather17°C (63°F)139 mm (5.5 inches)87%very high
July Weather21°C (71°F)192 mm (7.6 inches)92%very high
August Weather22°C (72°F)184 mm (7.3 inches)92%extreme
September Weather18°C (65°F)138 mm (5.4 inches)86%very high
October Weather12°C (53°F)166 mm (6.5 inches)82%high
November Weather5°C (42°F)103 mm (4.1 inches)79%moderate
December Weather-2°C (30°F)122 mm (4.8 inches)80%moderate

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