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September Weather in Omamacho-omama, Japan

Last updated: August 23, 2025

In September, the average temperature in Omamacho-omama, Japan hovers around 21°C (69°F). Expect comfortable days, though temperatures can dip to a minimum of 10°C (49°F) and soar up to a maximum of 32°C (89°F). Be prepared for some rain, as the area receives about 184 mm (7.2 in) of precipitation over 20 days. With an average humidity of 89%, it’s wise to stay hydrated and enjoy the lush surroundings!

September Temperature in Omamacho-omama

In September in Omamacho-omama, the average temperature is 21°C (69°F). The maximum can reach 32°C (89°F) and the minimum can be as low as 10°C (49°F). This pleasant weather makes Omamacho-omama an ideal destination for travelers seeking a comfortable climate.

September Weather in Omamacho-omama: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Omamacho-omama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omamacho-omama, September typically has an average temperature of 21°C (69°F), with highs reaching up to 32°C (89°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec353644526267747769594939
Data source: Temperature data for Omamacho-omama 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 Omamacho-omama

In Omamacho-omama in September, the total precipitation amount is 184 mm (7.2 in) during a span of 20 days.

September Precipitation Trends in Omamacho-omama

The chart displays monthly precipitation patterns in Omamacho-omama, 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 Omamacho-omama, September typically receives around 184 mm (7.2 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec45431151231301662621791842514349
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Omamacho-omama

In Omamacho-omama in September, humidity is 89%. With an average temperature of 21°C (69°F), this humidity feels like a warm blanket enveloping you, making travel a bit sticky and requiring frequent breaks to cool off and stay hydrated.

September Average Humidity in Omamacho-omama

This chart illustrates the average monthly humidity levels in Omamacho-omama, 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 Omamacho-omama is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Omamacho-omama

In Omamacho-omama 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 Omamacho-omama.

Maximum UV Index Levels in Omamacho-omama for September

The chart shows the monthly maximum UV Index (UVI) for Omamacho-omama 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 Omamacho-omama typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111119753
Data source: Omamacho-omama 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 Omamacho-omama Compares to Other Months

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

This table compares monthly weather conditions in Omamacho-omama, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)45 mm (1.8 inches)88%moderate
February Weather2°C (37°F)43 mm (1.7 inches)86%moderate
March Weather7°C (44°F)115 mm (4.5 inches)81%very high
April Weather11°C (52°F)123 mm (4.9 inches)78%very high
May Weather17°C (62°F)130 mm (5.1 inches)81%very high
June Weather20°C (68°F)166 mm (6.5 inches)88%extreme
July Weather23°C (74°F)262 mm (10.3 inches)92%extreme
August Weather25°C (77°F)179 mm (7.1 inches)92%extreme
September Weather21°C (69°F)184 mm (7.2 inches)89%very high
October Weather15°C (60°F)251 mm (9.9 inches)87%high
November Weather9°C (49°F)43 mm (1.7 inches)85%moderate
December Weather4°C (39°F)49 mm (1.9 inches)86%moderate

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