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September Weather in Motosu, Japan

Last updated: August 23, 2025

In September, the average temperature in Motosu, Japan hovers around 23°C (74°F). Expect cool evenings with a minimum of 12°C (54°F), while daytime highs can reach a sweltering 35°C (95°F). Rain is a common companion, as the region receives around 298 mm (11.7 in) of precipitation over 16 days. Keep in mind the average humidity level of 87%, which adds to the lush atmosphere of this tropical destination.

September Temperature in Motosu

In September in Motosu, the average temperature is 23°C (74°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 12°C (54°F). This makes Motosu an ideal destination for travelers looking for warm weather with a comfortable range of temperatures.

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

The chart illustrates September temperature patterns in Motosu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Motosu, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec394048566571788174645343
Data source: Temperature data for Motosu 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 Motosu

In Motosu, in September, the precipitation amount is 298 mm (11.7 in) over a span of 16 days.

September Precipitation Trends in Motosu

The chart displays monthly precipitation patterns in Motosu, 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 Motosu, September typically receives around 298 mm (11.7 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec71791792232292454933222982347494
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Motosu

In Motosu in September, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.

September Average Humidity in Motosu

This chart illustrates the average monthly humidity levels in Motosu, 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 Motosu is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Motosu

In Motosu in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Motosu.

Maximum UV Index Levels in Motosu for September

The chart shows the monthly maximum UV Index (UVI) for Motosu 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 Motosu typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110753
Data source: Motosu 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 Motosu Compares to Other Months

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

This table compares monthly weather conditions in Motosu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)71 mm (2.8 inches)82%moderate
February Weather4°C (40°F)79 mm (3.1 inches)79%high
March Weather9°C (48°F)179 mm (7.1 inches)74%very high
April Weather13°C (56°F)223 mm (8.8 inches)76%very high
May Weather18°C (65°F)229 mm (9.0 inches)83%extreme
June Weather22°C (71°F)245 mm (9.7 inches)87%extreme
July Weather26°C (78°F)493 mm (19.4 inches)93%extreme
August Weather27°C (82°F)322 mm (12.7 inches)91%extreme
September Weather23°C (74°F)298 mm (11.7 inches)87%very high
October Weather18°C (64°F)234 mm (9.2 inches)85%high
November Weather12°C (53°F)74 mm (2.9 inches)83%moderate
December Weather6°C (43°F)94 mm (3.7 inches)83%moderate

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