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September Weather in Shimizu, Japan

Last updated: August 23, 2025

In September, the average temperature in Shimizu, Japan hovers around 16°C (61°F). Expect temperatures to range from a chilly 1°C (34°F) to a warm 30°C (87°F). The month brings 127 mm (5.0 in) of precipitation, typically falling over 13 days, contributing to an average humidity level of a high 89%.

September Temperature in Shimizu

In September in Shimizu, the average temperature is 16°C (61°F). Maximum temperatures can reach as high as 30°C (87°F), while the minimum can dip down to 1°C (34°F). Pack accordingly to enjoy the diverse weather and stay comfortable during your travels!

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

The chart illustrates September temperature patterns in Shimizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shimizu, September typically has an average temperature of 16°C (61°F), with highs reaching up to 30°C (87°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec171930415359666660493723
Data source: Temperature data for Shimizu 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 Shimizu

In Shimizu in September, the total precipitation amount is 127 mm (5.0 in) spread over 13 days.

September Precipitation Trends in Shimizu

The chart displays monthly precipitation patterns in Shimizu, 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 Shimizu, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec5055908986109981711271528959
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Shimizu

In Shimizu in September, humidity is 89%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities feel sluggish and sticky, which can be quite challenging for travelers looking to explore.

September Average Humidity in Shimizu

This chart illustrates the average monthly humidity levels in Shimizu, 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 Shimizu is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%83%86%88%93%96%89%83%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Shimizu

In Shimizu in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Shimizu.

Maximum UV Index Levels in Shimizu for September

The chart shows the monthly maximum UV Index (UVI) for Shimizu 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 Shimizu typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236891010108632
Data source: Shimizu 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 Shimizu Compares to Other Months

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

This table compares monthly weather conditions in Shimizu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)50 mm (2.0 inches)84%low
February Weather-7°C (19°F)54 mm (2.1 inches)83%moderate
March Weather-1°C (31°F)89 mm (3.5 inches)83%high
April Weather5°C (42°F)89 mm (3.5 inches)83%very high
May Weather12°C (53°F)86 mm (3.4 inches)86%very high
June Weather15°C (59°F)109 mm (4.3 inches)88%very high
July Weather19°C (66°F)98 mm (3.8 inches)93%very high
August Weather19°C (66°F)171 mm (6.7 inches)96%very high
September Weather16°C (61°F)127 mm (5.0 inches)89%very high
October Weather10°C (49°F)152 mm (6.0 inches)83%high
November Weather3°C (37°F)89 mm (3.5 inches)80%moderate
December Weather-5°C (24°F)58 mm (2.3 inches)79%low

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