September Weather in Kariwa, Japan

Last updated: August 23, 2025

In September, the average temperature in Kariwa, Japan reaches a pleasant 23°C (74°F). Visitors can expect a range from a cool 15°C (59°F) to a warm 35°C (96°F). However, be prepared for 16 days of potential rainfall, accumulating to 153 mm (6.0 in), while the air tends to be quite humid, with an average humidity of 89%.

September Temperature in Kariwa

In September in Kariwa, the average temperature is 23°C (74°F). The maximum can reach 35°C (96°F), and the minimum can be as low as 15°C (59°F). This makes it an ideal time for travelers seeking pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Kariwa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kariwa, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in Kariwa

In Kariwa in September, the precipitation amount is 153 mm (6.0 in) over the course of 16 days.

September Precipitation Trends in Kariwa

The chart displays monthly precipitation patterns in Kariwa, 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 Kariwa, September typically receives around 153 mm (6.0 inches) of precipitation spread over approximately 16 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 Kariwa

In Kariwa in September humidity is 89%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling feel stifling and exhausting as you navigate the thick air.

September Average Humidity in Kariwa

This chart illustrates the average monthly humidity levels in Kariwa, 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 Kariwa is approximately 89%, 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 Kariwa

In Kariwa 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 Kariwa.

Maximum UV Index Levels in Kariwa for September

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

Data source: Kariwa 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 Kariwa Compares to Other Months

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

This table compares monthly weather conditions in Kariwa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	202 mm (8.0 inches)	88%	moderate
February Weather	4°C (40°F)	165 mm (6.5 inches)	86%	moderate
March Weather	8°C (46°F)	127 mm (5.0 inches)	81%	high
April Weather	11°C (53°F)	113 mm (4.5 inches)	78%	very high
May Weather	17°C (63°F)	101 mm (4.0 inches)	81%	very high
June Weather	21°C (70°F)	101 mm (4.0 inches)	88%	very high
July Weather	25°C (78°F)	263 mm (10.3 inches)	92%	extreme
August Weather	27°C (81°F)	181 mm (7.1 inches)	92%	extreme
September Weather	23°C (74°F)	153 mm (6.0 inches)	89%	very high
October Weather	18°C (64°F)	168 mm (6.6 inches)	87%	high
November Weather	12°C (54°F)	177 mm (7.0 inches)	85%	moderate
December Weather	7°C (44°F)	263 mm (10.4 inches)	86%	moderate