Typically, you can expect that the weather in Baltimore through the whole of September is 21. Highs are expected to be 27 and low of 18 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 21 |
| High Temperature | 27 |
| Low Temperature | 18 |
Useful Links: Baltimore Weather: Average Weather & Yearly Climate