Average temperatures in Seattle during September is 14, with highs being around 20 and lows around 11. Discover more info below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 14 |
| High Temperature | 20 |
| Low Temperature | 11 |
| Sunshine Per Day | 8 |
Seattle, Washington (USA) Weather in September FAQs
What is the average weather?
14
What’s the difference in temperature between summer and winter?
On average the summer and winter weather differs by 7.
Will I see a lot of sun?
You should expect 8 of sunshine per day
Useful Links: Seattle Weather: Average Weather & Yearly Climate