| Region | Number of Dry Spells | Mean Duration of Dry Spells (days) | Longest Dry Spell (days) | Day when Longest Dry Spell Starts |
|---|---|---|---|---|
| Statewide | 46 | 5 | 16 | 18 Feb |
| Clim. Div. 1 | 49 | 5 | 16 | 22 Aug |
| Clim. Div. 2 | 46 | 5 | 16 | 22 Aug |
| Clim. Div. 3 | 47 | 5 | 14 | 22 Aug |
| Clim. Div. 4 | 49 | 5 | 16 | 18 Feb |
| Clim. Div. 5 | 48 | 5 | 16 | 18 Feb |
| Clim. Div. 6 | 46 | 5 | 16 | 18 Feb |
| Clim. Div. 7 | 44 | 5 | 16 | 18 Feb |
| Clim. Div. 8 | 45 | 4 | 11 | 2 Aug |
| Allegany | 44 | 5 | 15 | 18 Feb |
| Anne Arundel | 48 | 5 | 16 | 18 Feb |
| Baltimore | 44 | 5 | 16 | 18 Feb |
| Calvert | 47 | 5 | 16 | 18 Feb |
| Caroline | 47 | 5 | 16 | 22 Aug |
| Carroll | 44 | 6 | 16 | 18 Feb |
| Cecil | 45 | 5 | 16 | 18 Feb |
| Charles | 49 | 5 | 16 | 18 Feb |
| Dorchester | 49 | 5 | 16 | 22 Aug |
| Frederick | 44 | 6 | 16 | 18 Feb |
| Garrett | 45 | 4 | 11 | 2 Aug |
| Harford | 45 | 5 | 16 | 18 Feb |
| Howard | 46 | 5 | 16 | 18 Feb |
| Kent | 47 | 5 | 16 | 18 Feb |
| Montgomery | 44 | 6 | 16 | 18 Feb |
| Prince George's | 50 | 5 | 16 | 18 Feb |
| Queen Anne's | 47 | 5 | 16 | 18 Feb |
| Saint Mary's | 47 | 5 | 14 | 22 Aug |
| Somerset | 49 | 5 | 16 | 22 Aug |
| Talbot | 46 | 5 | 16 | 22 Aug |
| Washington | 44 | 5 | 16 | 18 Feb |
| Wicomico | 48 | 5 | 16 | 22 Aug |
| Worcester | 50 | 5 | 16 | 22 Aug |
| Baltimore City | 45 | 5 | 16 | 18 Feb |