When to go · Seattle
Seattle in September
Great month. Inside Seattle's best window: Jun–Sep.
Key facts
- Verdict
- Great
- Temperature
- 72°C (162°F)162°F (72°C) / 54°C (129°F)129°F (54°C)
- average high / low
- Rain days
- 8
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Seattle's best window: Jun–Sep.
Is another month better than September?
No other month rates higher than September for Seattle in this guide.
Weather in September
- SeattleHighs around 72 °C (162 °F), lows around 54 °C (129 °F), rain on about 8 daysHighs around 162 °F (72 °C), lows around 129 °F (54 °C), rain on about 8 days
- Pacific Northwest, United States · Seattle, Portland, Olympic, Mount Rainierbest weather
Grey and damp October–May; July–September is dry and clear, with wildfire smoke in some years.
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
Compare two months
Weather, crowds and prices for any two months in Seattle, side by side.
Verdict
Sep: Great
Jun: Great
Daytime high
Sep: 72 °C (162 °F)162 °F (72 °C)
Jun: 71 °C (160 °F)160 °F (71 °C)
Night low
Sep: 54 °C (129 °F)129 °F (54 °C)
Jun: 53 °C (127 °F)127 °F (53 °C)
Rain days
Sep: 8 (better)
Jun: 9
Crowds
Sep: Medium
Jun: High
Prices
Sep: Medium
Jun: High
Festivals listed
Sep: 1
Jun: 0
September: Inside Seattle's best window: Jun–Sep.
June: Inside Seattle's best window: Jun–Sep.
Seattle: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen