| Region | Number of Dry Spells | Mean Duration of Dry Spells (days) | Longest Dry Spell (days) | Day when Longest Dry Spell Starts |
|---|---|---|---|---|
| Statewide | 38 | 6 | 34 | 8 Oct |
| Clim. Div. 1 | 41 | 6 | 43 | 29 Sep |
| Clim. Div. 2 | 40 | 6 | 39 | 3 Oct |
| Clim. Div. 3 | 43 | 6 | 39 | 3 Oct |
| Clim. Div. 4 | 43 | 6 | 39 | 3 Oct |
| Clim. Div. 5 | 41 | 6 | 39 | 3 Oct |
| Clim. Div. 6 | 42 | 5 | 39 | 3 Oct |
| Clim. Div. 7 | 47 | 5 | 34 | 8 Oct |
| Clim. Div. 8 | 48 | 4 | 14 | 18 Oct |
| Allegany | 48 | 5 | 25 | 17 Oct |
| Anne Arundel | 44 | 6 | 39 | 3 Oct |
| Baltimore | 43 | 5 | 39 | 3 Oct |
| Calvert | 43 | 6 | 39 | 3 Oct |
| Caroline | 38 | 6 | 40 | 2 Oct |
| Carroll | 42 | 6 | 39 | 3 Oct |
| Cecil | 45 | 5 | 39 | 3 Oct |
| Charles | 40 | 6 | 39 | 3 Oct |
| Dorchester | 40 | 6 | 40 | 2 Oct |
| Frederick | 42 | 6 | 39 | 3 Oct |
| Garrett | 48 | 4 | 14 | 18 Oct |
| Harford | 43 | 5 | 39 | 3 Oct |
| Howard | 41 | 6 | 39 | 3 Oct |
| Kent | 42 | 6 | 39 | 3 Oct |
| Montgomery | 40 | 6 | 39 | 3 Oct |
| Prince George's | 42 | 6 | 39 | 3 Oct |
| Queen Anne's | 42 | 6 | 39 | 3 Oct |
| Saint Mary's | 42 | 6 | 39 | 3 Oct |
| Somerset | 40 | 6 | 40 | 2 Oct |
| Talbot | 41 | 6 | 39 | 3 Oct |
| Washington | 46 | 5 | 34 | 8 Oct |
| Wicomico | 41 | 6 | 43 | 29 Sep |
| Worcester | 41 | 6 | 43 | 29 Sep |
| Baltimore City | 43 | 5 | 39 | 3 Oct |