September Weather in Nagasu, Japan

Last updated: August 23, 2025

In September, the average temperature in Nagasu, Japan is a pleasant 25°C (78°F). Expect a range where the minimum dips to 15°C (59°F) and the maximum can rise to 34°C (93°F). With an average humidity of 84%, the atmosphere feels quite lush. Be prepared for some rain, as 192 mm (7.6 in) of precipitation can occur over 14 days.

September Temperature in Nagasu

In September in Nagasu, the average temperature is 25°C (78°F). Maximums can reach 34°C (93°F) and minimums can be as low as 15°C (59°F). This pleasant climate makes Nagasu an ideal destination for travelers seeking a mix of warmth and comfort during their visit.

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

The chart illustrates September temperature patterns in Nagasu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagasu, September typically has an average temperature of 25°C (78°F), with highs reaching up to 34°C (93°F) and lows dropping to around 15°C (59°F).

Data source: Temperature data for Nagasu generated using information from the Copernicus Climate Change Service.

September Precipitation in Nagasu

In Nagasu in September, the total precipitation amount is 192 mm (7.6 in) over the course of 14 days.

September Precipitation Trends in Nagasu

The chart displays monthly precipitation patterns in Nagasu, 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 Nagasu, September typically receives around 192 mm (7.6 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Nagasu

In Nagasu in September, humidity is 84%. With an average temperature of 25°C (78°F), this humidity feels like a warm, muggy embrace that can be quite stifling for traveling, making you crave cool breezes and plenty of hydration as you explore.

September Average Humidity in Nagasu

This chart illustrates the average monthly humidity levels in Nagasu, 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 Nagasu is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nagasu

In Nagasu in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Nagasu.

Maximum UV Index Levels in Nagasu for September

The chart shows the monthly maximum UV Index (UVI) for Nagasu 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 Nagasu typically reaches 11, which falls under the extreme exposure category.

Data source: Nagasu 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 Nagasu Compares to Other Months

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

This table compares monthly weather conditions in Nagasu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	52 mm (2.0 inches)	75%	moderate
February Weather	8°C (47°F)	88 mm (3.5 inches)	71%	high
March Weather	12°C (54°F)	131 mm (5.1 inches)	71%	very high
April Weather	16°C (61°F)	126 mm (4.9 inches)	78%	extreme
May Weather	20°C (69°F)	201 mm (7.9 inches)	84%	extreme
June Weather	24°C (75°F)	246 mm (9.7 inches)	86%	extreme
July Weather	27°C (81°F)	465 mm (18.3 inches)	92%	extreme
August Weather	28°C (84°F)	299 mm (11.8 inches)	91%	extreme
September Weather	25°C (78°F)	192 mm (7.6 inches)	84%	extreme
October Weather	20°C (68°F)	111 mm (4.4 inches)	83%	high
November Weather	14°C (58°F)	66 mm (2.6 inches)	81%	high
December Weather	9°C (49°F)	77 mm (3.0 inches)	79%	moderate