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Washington State United States of America
Precipitation in September
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September Rainfall Precipitation in Washington State

Washington State is a region in the United States of America. In September precipitation ranges from low in Moses Lake with 6.1 mm of rainfall to high in North Cascades National Park with 134 mm of rainfall. September is a summer month in Washington State.

Where and how much does it rain in Washington State in September?

Find the average total precipitation in September for the most popular destinations in Washington State on the map below. Click on a destination dot for more detailed information.

Weather conditions Weather
Temperatures
Precipitation
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Legend heavy rainfall high moderate low almost none
Heavy rainfall has been defined as more than 160 mm precipitation. High: 90 mm to 160 mm. Moderate: 30 mm to 90 mm. Low: 5 mm to 30 mm.

  • How much rainfall does Washington State receive in September?
    • During September, Seattle often sees a mix of wet and dry days, with an average rainfall of around 49 mm.

  • What is the wettest city in September in Washington State?
    • Our data indicates that North Cascades National Park holds the record for the most average rainfall with 134 mm.

  • What is the driest city in September in Washington State?
    • The driest place is Moses Lake with an average precipitation of 6.1 mm according to our data.

    Interested in more climate information?

    We have much more information about the climate in Washington State. Interested in the weather conditions in a specific month? Select the month below.

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