September Weather in Ichihara, Japan

Last updated: August 23, 2025

In September, the average temperature in Ichihara, Japan is a pleasant 24°C (75°F). Expect a minimum of 16°C (60°F) and a maximum of 32°C (89°F), making it a comfortable month overall. However, be prepared for 232 mm (9.1 in) of precipitation spread across 18 days, contributing to an average humidity of 86%.

September Temperature in Ichihara

In September in Ichihara, the average temperature is 24°C (75°F). Maximums can reach 32°C (89°F), while minimums can drop to 16°C (60°F). This pleasant climate makes it an ideal time for outdoor activities and sightseeing in Ichihara.

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

The chart illustrates September temperature patterns in Ichihara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ichihara, September typically has an average temperature of 24°C (75°F), with highs reaching up to 32°C (89°F) and lows dropping to around 16°C (60°F).

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

September Precipitation in Ichihara

In Ichihara in September, the total precipitation amount is 232 mm (9.1 in) spread over 18 days.

September Precipitation Trends in Ichihara

The chart displays monthly precipitation patterns in Ichihara, 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 Ichihara, September typically receives around 232 mm (9.1 inches) of precipitation spread over approximately 18 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Ichihara

In Ichihara 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 Ichihara

This chart illustrates the average monthly humidity levels in Ichihara, 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 Ichihara is approximately 86%, 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 Ichihara

In Ichihara 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 Ichihara.

Maximum UV Index Levels in Ichihara for September

The chart shows the monthly maximum UV Index (UVI) for Ichihara 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 Ichihara typically reaches 9, which falls under the very high exposure category.

Data source: Ichihara 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 Ichihara Compares to Other Months

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

This table compares monthly weather conditions in Ichihara, 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 (43°F)	63 mm (2.5 inches)	76%	moderate
February Weather	7°C (44°F)	50 mm (2.0 inches)	74%	moderate
March Weather	10°C (50°F)	162 mm (6.4 inches)	70%	high
April Weather	14°C (57°F)	137 mm (5.4 inches)	74%	very high
May Weather	19°C (66°F)	147 mm (5.8 inches)	81%	very high
June Weather	22°C (71°F)	190 mm (7.5 inches)	88%	extreme
July Weather	25°C (78°F)	226 mm (8.9 inches)	93%	extreme
August Weather	27°C (81°F)	118 mm (4.7 inches)	90%	extreme
September Weather	24°C (75°F)	232 mm (9.1 inches)	86%	very high
October Weather	19°C (66°F)	313 mm (12.3 inches)	83%	high
November Weather	14°C (58°F)	119 mm (4.7 inches)	80%	moderate
December Weather	9°C (48°F)	80 mm (3.2 inches)	78%	moderate