September Weather in Yachimata, Japan

Last updated: August 23, 2025

In {Yachimata}, {Japan}, the average temperature in {September} hovers around 24°C (75°F), with a minimum of 14°C (58°F) and a maximum peaking at 35°C (94°F). Expect 186 mm (7.3 in) of precipitation spread over 17 days, contributing to the average humidity level of a rather muggy 83%.

September Temperature in Yachimata

In September in Yachimata, the average temperature is 24°C (75°F). Maximums can reach up to 35°C (94°F), while minimums can drop as low as 14°C (58°F). This diverse range of temperatures makes it an ideal time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Yachimata, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yachimata, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (94°F) and lows dropping to around 14°C (58°F).

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

September Precipitation in Yachimata

In Yachimata in September, the precipitation amount is 186 mm (7.3 in), occurring over the course of 17 days.

September Precipitation Trends in Yachimata

The chart displays monthly precipitation patterns in Yachimata, 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 Yachimata, September typically receives around 186 mm (7.3 inches) of precipitation spread over approximately 17 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 Yachimata

In Yachimata in September, humidity is 83%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket enveloping you, which can be quite stifling for traveling. You may find yourself frequently seeking shade or air conditioning, and it's wise to stay hydrated while exploring.

September Average Humidity in Yachimata

This chart illustrates the average monthly humidity levels in Yachimata, 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 Yachimata is approximately 83%, 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 Yachimata

In Yachimata 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 Yachimata.

Maximum UV Index Levels in Yachimata for September

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

Data source: Yachimata 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 Yachimata Compares to Other Months

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

This table compares monthly weather conditions in Yachimata, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	52 mm (2.1 inches)	70%	moderate
February Weather	6°C (44°F)	46 mm (1.8 inches)	69%	moderate
March Weather	10°C (51°F)	136 mm (5.4 inches)	68%	very high
April Weather	14°C (58°F)	116 mm (4.6 inches)	73%	very high
May Weather	19°C (67°F)	128 mm (5.0 inches)	81%	extreme
June Weather	22°C (72°F)	161 mm (6.3 inches)	88%	extreme
July Weather	26°C (79°F)	223 mm (8.8 inches)	94%	extreme
August Weather	28°C (82°F)	102 mm (4.0 inches)	87%	extreme
September Weather	24°C (75°F)	186 mm (7.3 inches)	83%	very high
October Weather	19°C (66°F)	254 mm (10.0 inches)	78%	high
November Weather	14°C (57°F)	101 mm (4.0 inches)	74%	moderate
December Weather	8°C (46°F)	71 mm (2.8 inches)	72%	moderate