September Weather in Tatsuno, Japan

Last updated: August 23, 2025

In September, the average temperature in Tatsuno, Japan hovers around 24°C (76°F), with minimums dipping to 18°C (65°F) and highs reaching up to 30°C (87°F). However, be prepared for some rain, as 228 mm (9.0 in) of precipitation is expected over 14 days. You'll also experience a high average humidity of 87%, contributing to a warm and tropical atmosphere.

September Temperature in Tatsuno

In September in Tatsuno, the average temperature is 24°C (76°F). Maximums can reach 30°C (87°F) and minimums can be as low as 18°C (65°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Tatsuno, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tatsuno, September typically has an average temperature of 24°C (76°F), with highs reaching up to 30°C (87°F) and lows dropping to around 18°C (65°F).

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

September Precipitation in Tatsuno

In Tatsuno in September, the total precipitation amount is 228 mm (9.0 in) distributed over 14 days.

September Precipitation Trends in Tatsuno

The chart displays monthly precipitation patterns in Tatsuno, 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 Tatsuno, September typically receives around 228 mm (9.0 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 Tatsuno

In Tatsuno in September, humidity is 87%. With an average temperature of 24°C (76°F), this humidity feels like a warm, clingy blanket enveloping you, making travel feel sluggish and sticky as you navigate the air thick with moisture.

September Average Humidity in Tatsuno

This chart illustrates the average monthly humidity levels in Tatsuno, 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 Tatsuno is approximately 87%, 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 Tatsuno

In Tatsuno 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 Tatsuno.

Maximum UV Index Levels in Tatsuno for September

The chart shows the monthly maximum UV Index (UVI) for Tatsuno 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 Tatsuno typically reaches 10, which falls under the very high exposure category.

Data source: Tatsuno 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 Tatsuno Compares to Other Months

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

This table compares monthly weather conditions in Tatsuno, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	42 mm (1.7 inches)	82%	moderate
February Weather	6°C (44°F)	55 mm (2.2 inches)	79%	moderate
March Weather	9°C (49°F)	109 mm (4.3 inches)	73%	very high
April Weather	13°C (56°F)	132 mm (5.2 inches)	74%	extreme
May Weather	18°C (64°F)	134 mm (5.3 inches)	84%	extreme
June Weather	21°C (71°F)	160 mm (6.3 inches)	86%	extreme
July Weather	25°C (78°F)	309 mm (12.2 inches)	92%	extreme
August Weather	27°C (81°F)	180 mm (7.1 inches)	92%	extreme
September Weather	24°C (76°F)	228 mm (9.0 inches)	87%	very high
October Weather	20°C (68°F)	229 mm (9.0 inches)	85%	high
November Weather	14°C (58°F)	43 mm (1.7 inches)	84%	moderate
December Weather	9°C (49°F)	56 mm (2.2 inches)	82%	moderate