Maryland Frost Dates
The median last spring freeze and first fall freeze (32°F) at 43 NOAA stations in Maryland, 1991-2020, with the growing season between them.
Every station
A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.
| Station | Elevation | Last freeze | First freeze | Season, days | Town page |
|---|---|---|---|---|---|
| Aberdeen Phillips Fld | 57 ft | April 10 | October 30 | 203 | Perryman |
| Annapolis Naf | 8 ft | March 23 | November 20 | 242 | Naval Academy |
| Annapolis Police Brks | 25 ft | March 27 | November 13 | 231 | Naval Academy |
| Assateague | 10 ft | March 31 | November 15 | 229 | Snow Hill |
| Baltimore Wash Intl AP | 156 ft | April 10 | October 31 | 204 | Severn |
| Beltsville | 145 ft | April 10 | November 1 | 205 | Beltsville |
| Catoctin Mtn Park | 1,610 ft | April 14 | October 30 | 199 | Thurmont |
| Chestertown | 40 ft | April 3 | November 5 | 216 | Kingstown |
| Conowingo Dam | 40 ft | April 3 | November 6 | 217 | Port Deposit |
| Cumberland 2 | 730 ft | April 15 | October 24 | 192 | Cumberland |
| Cylburn | 235 ft | April 2 | November 7 | 219 | Cold Spring |
| Dalecarlia Rsvr | 150 ft | April 9 | October 31 | 205 | Brookmont |
| Damascus 3 Ssw | 700 ft | April 14 | October 29 | 198 | Damascus |
| Emmitsburg 2 Se | 403 ft | April 22 | October 20 | 181 | Emmitsburg |
| Frederick Police Brks | 380 ft | April 2 | November 6 | 218 | Frederick |
| Frostburg 2 | 2,170 ft | April 29 | October 18 | 172 | Frostburg |
| Glenn Dale Bell Stn | 150 ft | April 22 | October 22 | 183 | Glenn Dale |
| Hagerstown 1 E | 532 ft | April 11 | October 28 | 200 | Hagerstown |
| Hagerstown Washington CO AP | 698 ft | April 7 | November 4 | 211 | |
| Laurel 3 W | 400 ft | April 5 | November 9 | 218 | West Laurel |
| Md Sci Ctr Baltimore | 20 ft | March 24 | November 21 | 242 | Inner Harbor |
| Mechanicsville 5 Ne | 100 ft | April 17 | October 27 | 193 | Golden Beach |
| Millers 4 Ne | 860 ft | April 19 | October 25 | 189 | |
| Natl Arboretum Dc | 50 ft | March 29 | November 8 | 224 | |
| Oakland 1 Se | 2,420 ft | May 6 | October 9 | 156 | Oakland |
| Ocean City Muni AP | 12 ft | April 7 | November 2 | 209 | West Ocean City |
| Oxon Hill | 190 ft | April 3 | November 8 | 219 | Oxon Hill |
| Patuxent River Nas | 39 ft | March 29 | November 15 | 231 | Drum Point |
| Rockville 1 Ne | 440 ft | April 1 | November 6 | 219 | Rockville |
| Royal Oak 2 Ssw | 10 ft | April 1 | November 7 | 220 | Oxford |
| Salisbury | 10 ft | April 3 | November 7 | 218 | Salisbury |
| Salisbury 2N | 20 ft | April 2 | November 10 | 222 | Salisbury |
| Salisbury Wicomico Rgnl AP | 48 ft | April 10 | October 30 | 203 | Salisbury |
| Savage Rvr Dam | 1,495 ft | April 29 | October 20 | 174 | |
| Sharpsburg 5 S | 400 ft | April 26 | October 18 | 175 | Sharpsburg |
| Sines Deep Creek | 2,040 ft | May 9 | October 11 | 155 | Oakland |
| Smithsburg 2NW | 670 ft | April 25 | October 19 | 177 | Smithsburg |
| Snow Hill 4 N | 30 ft | April 10 | October 31 | 204 | Snow Hill |
| Solomons | 12 ft | March 22 | November 26 | 249 | Solomons |
| St Inigoes Webster Nolf | 21 ft | March 30 | November 14 | 229 | Piney Point |
| Stevensville 2SW | 10 ft | March 29 | November 12 | 228 | Stevensville |
| Upper Marlboro 3 Nnw | 130 ft | April 9 | October 29 | 203 | Brock Hall |
| Vienna | 10 ft | April 8 | November 4 | 210 | Sharptown |
Sources
NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.