Frost dates in Thurmont, MD
The average last spring frost in Thurmont is around April 22 and the first fall frost is around October 26. That gives Thurmont an average growing season of about 187 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 7 |
First fall frost
| Early (10%) | October 9 |
|---|---|
| Average (50%) | October 26 |
| Late (90% chance before) | November 7 |