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September Weather in Furukawa, Japan

Last updated: August 23, 2025

In September, the average temperature in Furukawa, Japan is a pleasant 21°C (71°F), with a range that can dip to a cool 9°C (49°F) and rise to a warm 33°C (92°F). Expect 138 mm (5.4 in) of precipitation spread over 13 days, contributing to an average humidity of 86%. Embrace the varied climate as you explore this charming destination!

September Temperature in Furukawa

In September in Furukawa, the average temperature is 21°C (71°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 9°C (49°F). This range makes it an ideal time for travelers to enjoy outdoor activities while also being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Furukawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Furukawa, September typically has an average temperature of 21°C (71°F), with highs reaching up to 33°C (92°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec353743516167757770604939
Data source: Temperature data for Furukawa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Furukawa

In Furukawa in September, the precipitation amount is 138 mm (5.4 in) over the course of 13 days.

September Precipitation Trends in Furukawa

The chart displays monthly precipitation patterns in Furukawa, 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 Furukawa, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec55471091111051062142161381984162
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Furukawa

In Furukawa in September, humidity is 86%. With an average temperature of 21°C (71°F), this humidity feels like a warm, dense blanket wrapping around you, making outdoor activities feel slightly stifling and requiring frequent breaks for hydration.

September Average Humidity in Furukawa

This chart illustrates the average monthly humidity levels in Furukawa, 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 Furukawa is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Furukawa

In Furukawa 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 Furukawa.

Maximum UV Index Levels in Furukawa for September

The chart shows the monthly maximum UV Index (UVI) for Furukawa 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 Furukawa typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478101011119643
Data source: Furukawa 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 Furukawa Compares to Other Months

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

This table compares monthly weather conditions in Furukawa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)55 mm (2.1 inches)80%moderate
February Weather3°C (37°F)47 mm (1.9 inches)79%moderate
March Weather6°C (43°F)109 mm (4.3 inches)77%high
April Weather10°C (51°F)111 mm (4.4 inches)75%very high
May Weather16°C (62°F)105 mm (4.1 inches)80%very high
June Weather20°C (68°F)105 mm (4.2 inches)87%very high
July Weather24°C (75°F)214 mm (8.4 inches)92%extreme
August Weather25°C (78°F)216 mm (8.5 inches)92%extreme
September Weather21°C (71°F)138 mm (5.4 inches)86%very high
October Weather16°C (61°F)198 mm (7.8 inches)82%high
November Weather10°C (50°F)41 mm (1.6 inches)79%moderate
December Weather4°C (39°F)62 mm (2.4 inches)80%moderate

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