Cheonan
South Korea
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Cheonan, South Korea

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  • The average high temperature in September: 26°C

The warmest month (with the highest average high temperature) is August (30.1°C).
The month with the lowest average high temperature is January (2.5°C).

  • The average low temperature in September: 15°C

The month with the highest average low temperature is August (21°C).
The coldest month (with the lowest average low temperature) is January (-7.9°C).

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  • The average humidity in September: 76.5%

The month with the highest relative humidity is July (79.4%).
The month with the lowest relative humidity is April (62.1%).

  • The average rainfall in September: 158.4mm

The wettest month (with the highest rainfall) is August (298.3mm).
The driest month (with the lowest rainfall) is January (23.4mm).

  • The average rainfall days in September: 8.6 days

The month with the highest number of rainy days is July (13.9 days).
The month with the lowest number of rainy days is October (6.2 days).

  • The average sunshine in September: 6.6h

The month with most sunshine is May (Average sunshine: 8h).
The month with least sunshine is December (Average sunshine: 5.2h).

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