Click on a day for an hourly weather forecast
The temperatures in Seattle in October are quite cold with temperatures between 7°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Seattle. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Seattle in October 2025.
If you’re planning to visit Seattle in the near future, we highly recommend that you review the 14 day weather forecast for Seattle before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 2° | 12 | 17 | 2 | 103 mm | Awful | Seattle in January |
| February | 8° / 1° | 9 | 16 | 3 | 72 mm | Awful | Seattle in February |
| March | 11° / 3° | 9 | 21 | 1 | 80 mm | Bad | Seattle in March |
| April | 14° / 4° | 6 | 24 | 0 | 55 mm | Good | Seattle in April |
| May | 19° / 7° | 5 | 27 | 0 | 39 mm | Good | Seattle in May |
| June | 22° / 9° | 3 | 27 | 0 | 29 mm | Good | Seattle in June |
| July | 27° / 12° | 1 | 30 | 0 | 11 mm | Perfect | Seattle in July |
| August | 27° / 12° | 1 | 30 | 0 | 17 mm | Perfect | Seattle in August |
| September | 23° / 11° | 3 | 27 | 0 | 36 mm | Perfect | Seattle in September |
| October | 16° / 7° | 8 | 23 | 0 | 78 mm | Ok | Seattle in October |
| November | 10° / 4° | 10 | 19 | 0 | 97 mm | Bad | Seattle in November |
| December | 7° / 1° | 9 | 20 | 2 | 87 mm | Awful | Seattle in December |