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September Weather in Nagareyama, Japan

Last updated: August 23, 2025

In September, the average temperature in Nagareyama, Japan hovers around 24°C (75°F). While you might enjoy the warmth, be prepared for a chill as lows can drop to 14°C (57°F). On the flip side, temperatures can soar to a steamy 34°C (93°F). With 192 mm (7.6 in) of rain spread over 16 days, an umbrella might become your best friend. Additionally, the air can feel quite humid, with an average humidity of 86%, making it feel even more tropical!

September Temperature in Nagareyama

In September in Nagareyama, the average temperature is 24°C (75°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 14°C (57°F). This pleasant climate makes Nagareyama an ideal destination for travelers looking to enjoy both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Nagareyama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagareyama, September typically has an average temperature of 24°C (75°F), with highs reaching up to 34°C (93°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec414350576772788275655646
Data source: Temperature data for Nagareyama 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 Nagareyama

In Nagareyama in September, the precipitation amount is 192 mm (7.6 in) during a span of 16 days.

September Precipitation Trends in Nagareyama

The chart displays monthly precipitation patterns in Nagareyama, 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 Nagareyama, September typically receives around 192 mm (7.6 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec49431341161251602241051922619064
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nagareyama

In Nagareyama in September, humidity is 86%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat uncomfortable and requiring travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Nagareyama

This chart illustrates the average monthly humidity levels in Nagareyama, 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 Nagareyama is approximately 86%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Nagareyama

In Nagareyama 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 Nagareyama.

Maximum UV Index Levels in Nagareyama for September

The chart shows the monthly maximum UV Index (UVI) for Nagareyama 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 Nagareyama typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119753
Data source: Nagareyama 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 Nagareyama Compares to Other Months

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

This table compares monthly weather conditions in Nagareyama, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)49 mm (1.9 inches)76%moderate
February Weather6°C (44°F)43 mm (1.7 inches)74%moderate
March Weather10°C (51°F)134 mm (5.3 inches)70%high
April Weather14°C (58°F)116 mm (4.6 inches)74%very high
May Weather19°C (67°F)125 mm (4.9 inches)81%very high
June Weather22°C (72°F)160 mm (6.3 inches)88%extreme
July Weather26°C (79°F)224 mm (8.8 inches)93%extreme
August Weather28°C (82°F)105 mm (4.1 inches)90%extreme
September Weather24°C (75°F)192 mm (7.6 inches)86%very high
October Weather19°C (66°F)261 mm (10.3 inches)83%high
November Weather13°C (56°F)90 mm (3.5 inches)80%moderate
December Weather8°C (46°F)64 mm (2.5 inches)78%moderate

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