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September Weather in Mizusawa, Japan

Last updated: August 23, 2025

In Mizusawa, Japan, the average temperature in September hovers around 19°C (67°F), offering a mild climate. However, be prepared for a temperature range that can dip to a chilly 4°C (39°F) or soar to a warm 33°C (91°F). This month typically brings 117 mm (4.6 in) of precipitation over 12 days, contributing to an average humidity of 86%. Ideal for those who enjoy a mix of warmth and the occasional refreshing shower!

September Temperature in Mizusawa

In September in Mizusawa, the average temperature is 19°C (67°F). Maximum can reach 33°C (91°F) and minimum can be as low as 4°C (39°F). This climate makes Mizusawa an ideal destination for travelers seeking mild weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Mizusawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mizusawa, September typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec293039475864727466554333
Data source: Temperature data for Mizusawa 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 Mizusawa

In Mizusawa in September, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

September Precipitation Trends in Mizusawa

The chart displays monthly precipitation patterns in Mizusawa, 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 Mizusawa, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec56691071191141291821671171545678
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mizusawa

In Mizusawa in September humidity is 86%. With an average temperature of 19°C (67°F), this humidity feels like traveling through a thick, warm blanket, making the air feel heavy and sticky, which can be quite uncomfortable for outdoor activities.

September Average Humidity in Mizusawa

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

In Mizusawa 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 Mizusawa.

Maximum UV Index Levels in Mizusawa for September

The chart shows the monthly maximum UV Index (UVI) for Mizusawa 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 Mizusawa typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891010109643
Data source: Mizusawa 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 Mizusawa Compares to Other Months

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

This table compares monthly weather conditions in Mizusawa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)56 mm (2.2 inches)80%moderate
February Weather-1°C (31°F)69 mm (2.7 inches)79%moderate
March Weather4°C (39°F)106 mm (4.2 inches)77%high
April Weather8°C (47°F)119 mm (4.7 inches)75%very high
May Weather14°C (58°F)114 mm (4.5 inches)80%very high
June Weather18°C (65°F)129 mm (5.1 inches)87%very high
July Weather22°C (72°F)182 mm (7.2 inches)92%very high
August Weather23°C (74°F)167 mm (6.6 inches)92%very high
September Weather19°C (67°F)117 mm (4.6 inches)86%very high
October Weather13°C (55°F)154 mm (6.1 inches)82%high
November Weather6°C (44°F)56 mm (2.2 inches)79%moderate
December Weather1°C (33°F)78 mm (3.1 inches)80%moderate

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