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Washington State United States of America
Temperatures in September
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Temperature in Washington State in September

Washington State is a region in the United States of America. September in has maximum daytime temperatures ranging from low in Mount Rainier National Park with 8°C to high temperatures in Pasco with 27°C. Nighttime temperatures generally drop to 10°C in Pasco and -3°C in Mount Rainier National Park . The month of September is in the summer season.

What is the temperature of the different cities in Washington State in September?

To get a sense of September's typical temperatures in the key spots of Washington State, explore the map below. Click on a point for an in-depth look.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in September in Washington State?
    • Data insights from our comprehensive database indicate that Pasco is the city with the highest warmth. Daytime peaks average near 27°C, while the nights are characterized by a low temperature close to 10°C."

  • What is the coldest city in September in Washington State?
    • According to our data, Mount Rainier National Park holds the title for the coldest city in Washington State in September. It experiences maximum temperatures of approximately 8°C and drops to lows of about -3°C during the night.

  • How much sun does Washington State get in September?
    • Seattle enjoys close to 220 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

    Interested in more climate information?

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