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September Weather in Kikonai, Japan

Last updated: August 23, 2025

In September, the average temperature in Kikonai, Japan hovers around 19°C (67°F), providing a mild climate. During this time, you can expect a minimum of 10°C (50°F) and a maximum of 29°C (84°F). However, be prepared for some rain, as precipitation averages 146 mm (5.7 in) over 12 days, coupled with a high humidity level of 89%.

September Temperature in Kikonai

In September in Kikonai, the average temperature is 19°C (67°F). Maximums can reach 29°C (84°F) and minimums can be as low as 10°C (50°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Kikonai.

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

The chart illustrates September temperature patterns in Kikonai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kikonai, September typically has an average temperature of 19°C (67°F), with highs reaching up to 29°C (84°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec293038455460687167574533
Data source: Temperature data for Kikonai 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 Kikonai

In Kikonai in September, the total precipitation amount is 146 mm (5.7 in) spread over a duration of 12 days.

September Precipitation Trends in Kikonai

The chart displays monthly precipitation patterns in Kikonai, 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 Kikonai, September typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5772839710111111719414613110184
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kikonai

In Kikonai in September, humidity is 89%. With an average temperature of 19°C (67°F), this humidity feels like a warm, muggy blanket enveloping you, making outdoor activities uncomfortable and encouraging travelers to seek shaded areas or indoor attractions during the hottest parts of the day.

September Average Humidity in Kikonai

This chart illustrates the average monthly humidity levels in Kikonai, 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 Kikonai is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kikonai

In Kikonai in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Kikonai.

Maximum UV Index Levels in Kikonai for September

The chart shows the monthly maximum UV Index (UVI) for Kikonai 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 Kikonai typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec345891010118632
Data source: Kikonai 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 Kikonai Compares to Other Months

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

This table compares monthly weather conditions in Kikonai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)57 mm (2.2 inches)79%moderate
February Weather-1°C (30°F)72 mm (2.8 inches)78%moderate
March Weather3°C (38°F)83 mm (3.3 inches)77%moderate
April Weather7°C (45°F)97 mm (3.8 inches)78%very high
May Weather12°C (54°F)101 mm (4.0 inches)86%very high
June Weather16°C (60°F)111 mm (4.4 inches)91%very high
July Weather20°C (68°F)117 mm (4.6 inches)95%very high
August Weather22°C (71°F)194 mm (7.6 inches)97%extreme
September Weather19°C (67°F)146 mm (5.7 inches)89%very high
October Weather14°C (57°F)131 mm (5.2 inches)81%high
November Weather7°C (46°F)101 mm (4.0 inches)78%moderate
December Weather1°C (34°F)84 mm (3.3 inches)77%low

Compare Kikonai's Climate with Cities Worldwide