Seattle in Autumn — Weather & What to Expect
Autumn in Seattle (September, October, November) averages daytime highs of 15.6°C and lows of 9.1°C, with around 345.3mm of rain across the season (39 rainy days in total). It includes some of the best months of the year to visit (September, October, November).
In the northern hemisphere, autumn in Seattle covers September, October, November.
Autumn in Seattle month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| September | 21.3°C | 13.1°C | 66.1mm | 8 | 10/10 |
| October | 15.4°C | 9.4°C | 104.4mm | 13 | 9/10 |
| November | 10.0°C | 4.9°C | 174.8mm | 18 | 9/10 |
What to pack for Seattle in autumn
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Light waterproof layer
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
- Compact travel umbrella
Frequently Asked Questions
Is autumn a good time to visit Seattle?
Autumn in Seattle rates around 9/10 — excellent time to visit. Average highs are 15.6°C with 345.3mm of rain across the season.
How hot is Seattle in autumn?
Daytime highs average 15.6°C (60.1°F) across September, October, November, with nights around 9.1°C.
What months are autumn in Seattle?
Seattle is in the northern hemisphere, so autumn covers September, October, November.
See also: best time to visit Seattle · Seattle annual climate · Seattle in spring · Seattle in summer · Seattle in winter
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Once you know what autumn in Seattle looks like, find out exactly what to pack for Seattle at 247PackingList. For currency, language and country facts, see the United States guide at 247CountryInfo.
Autumn in Seattle — what to pack
Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →Check clothing sizes in United States at 247Sizing before you shop.
More autumn travel essentials
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.