Average temperature within Seattle all through March is 6. You can expect highs around 12 degrees celsius and a low of 3 degrees. We have put some more details below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 12 |
| Low Temperature | 3 |
| Sunshine Per Day | 6 |
Useful Links: Seattle Weather: Average Weather & Yearly Climate