September Weather in Hirara, Japan

Last updated: August 23, 2025

In September, the average temperature in Hirara, Japan hovers around 28°C (83°F), offering a warm respite. Minimum temperatures can dip to 25°C (77°F), while the maximum can reach 30°C (87°F). Be prepared for the wet season, as the area typically experiences 260 mm (10.3 in) of precipitation over 17 days, contributing to an average humidity level of 83%.

September Temperature in Hirara

In September in Hirara, the average temperature is 28°C (83°F), with maximums reaching up to 30°C (87°F) and minimums dropping to as low as 25°C (77°F). This pleasant climate makes Hirara an ideal destination for travelers seeking warm and enjoyable weather.

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

The chart illustrates September temperature patterns in Hirara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hirara, September typically has an average temperature of 28°C (83°F), with highs reaching up to 30°C (87°F) and lows dropping to around 25°C (77°F).

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

September Precipitation in Hirara

In Hirara, in September, the precipitation amount is 260 mm (10.3 in) over a span of 17 days.

September Precipitation Trends in Hirara

The chart displays monthly precipitation patterns in Hirara, 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 Hirara, September typically receives around 260 mm (10.3 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 Hirara

In Hirara in September humidity is 83%. With an average temperature of 28°C (83°F), this humidity feels like a warm, sticky blanket wrapping around you, making travel uncomfortable and requiring frequent breaks to hydrate and cool down.

September Average Humidity in Hirara

This chart illustrates the average monthly humidity levels in Hirara, 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 Hirara 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 Hirara

In Hirara in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Hirara.

Maximum UV Index Levels in Hirara for September

The chart shows the monthly maximum UV Index (UVI) for Hirara 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 Hirara typically reaches 13, which falls under the extreme exposure category.

Data source: Hirara 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 Hirara Compares to Other Months

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

This table compares monthly weather conditions in Hirara, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (68°F)	90 mm (3.6 inches)	73%	high
February Weather	20°C (68°F)	74 mm (2.9 inches)	73%	very high
March Weather	21°C (71°F)	135 mm (5.3 inches)	77%	extreme
April Weather	23°C (73°F)	126 mm (5.0 inches)	83%	extreme
May Weather	25°C (78°F)	157 mm (6.2 inches)	85%	extreme
June Weather	28°C (82°F)	232 mm (9.2 inches)	86%	extreme
July Weather	29°C (84°F)	221 mm (8.7 inches)	84%	extreme
August Weather	28°C (83°F)	279 mm (11.0 inches)	82%	extreme
September Weather	28°C (83°F)	260 mm (10.3 inches)	83%	extreme
October Weather	26°C (79°F)	140 mm (5.5 inches)	81%	very high
November Weather	24°C (76°F)	123 mm (4.9 inches)	81%	very high
December Weather	22°C (71°F)	229 mm (9.0 inches)	77%	high