State hub
Maryland frost dates by weather station
Maryland has 43 NOAA weather stations with 1991–2020 freeze statistics. Median last spring frost dates run from Mar 22 at Solomons to May 9 at Sines Deep Creek.
- 43Stations
- Mar 22Earliest last frostSolomons
- May 9Latest last frostSines Deep Creek
- 248 daysLongest growing seasonSolomons
| Station | Last spring frost | First fall frost | Growing season | Elevation |
|---|---|---|---|---|
| Aberdeen Phillips Field | Apr 10 | Oct 30 | 201 days | 57 ft |
| Annapolis Naf | Mar 23 | Nov 20 | 241 days | 8 ft |
| Annapolis Police Brks | Mar 27 | Nov 13 | 234 days | 25 ft |
| Assateague | Mar 31 | Nov 15 | 228 days | 10 ft |
| Baltimore Wash Intl Airport | Apr 10 | Oct 31 | 204 days | 156 ft |
| Beltsville | Apr 10 | Nov 1 | 202 days | 145 ft |
| Catoctin Mountain Park | Apr 14 | Oct 30 | 197 days | 1,610 ft |
| Chestertown | Apr 3 | Nov 5 | 217 days | 40 ft |
| Conowingo Dam | Apr 3 | Nov 6 | 217 days | 40 ft |
| Cumberland 2 | Apr 15 | Oct 24 | 190 days | 730 ft |
| Cylburn | Apr 2 | Nov 7 | 220 days | 235 ft |
| Dalecarlia Rsvr | Apr 9 | Oct 31 | 202 days | 150 ft |
| Damascus 3 SSW | Apr 14 | Oct 29 | 196 days | 700 ft |
| Emmitsburg 2 SE | Apr 22 | Oct 20 | 179 days | 403 ft |
| Frederick Police Brks | Apr 2 | Nov 6 | 218 days | 380 ft |
| Frostburg 2 | Apr 29 | Oct 18 | 171 days | 2,170 ft |
| Glenn Dale Bell Station | Apr 22 | Oct 22 | 183 days | 150 ft |
| Hagerstown 1 E | Apr 11 | Oct 28 | 199 days | 532 ft |
| Hagerstown Washington Co Airport | Apr 7 | Nov 4 | 209 days | 698 ft |
| Laurel 3 W | Apr 5 | Nov 9 | 218 days | 400 ft |
| Md Sci Center Baltimore | Mar 24 | Nov 21 | 244 days | 20 ft |
| Mechanicsville 5 NE | Apr 17 | Oct 27 | 195 days | 100 ft |
| Millers 4 NE | Apr 19 | Oct 25 | 188 days | 860 ft |
| National Arboretum DC | Mar 29 | Nov 8 | 224 days | 50 ft |
| Oakland 1 SE | May 6 | Oct 9 | 156 days | 2,420 ft |
| Ocean City Muni Airport | Apr 7 | Nov 2 | 209 days | 12 ft |
| Oxon Hill | Apr 3 | Nov 8 | 217 days | 190 ft |
| Patuxent River NAS | Mar 29 | Nov 15 | 230 days | 39 ft |
| Rockville 1 NE | Apr 1 | Nov 6 | 219 days | 440 ft |
| Royal Oak 2 SSW | Apr 1 | Nov 7 | 220 days | 10 ft |
| Salisbury | Apr 3 | Nov 7 | 217 days | 10 ft |
| Salisbury 2n | Apr 2 | Nov 10 | 222 days | 20 ft |
| Salisbury Wicomico Regional Airport | Apr 10 | Oct 30 | 201 days | 48 ft |
| Savage River Dam | Apr 29 | Oct 20 | 174 days | 1,495 ft |
| Sharpsburg 5 S | Apr 26 | Oct 18 | 175 days | 400 ft |
| Sines Deep Creek | May 9 | Oct 11 | 155 days | 2,040 ft |
| Smithsburg 2nw | Apr 25 | Oct 19 | 176 days | 670 ft |
| Snow Hill 4 N | Apr 10 | Oct 31 | 202 days | 30 ft |
| Solomons | Mar 22 | Nov 26 | 248 days | 12 ft |
| St. Inigoes Webster Nolf | Mar 30 | Nov 14 | 229 days | 21 ft |
| Stevensville 2sw | Mar 29 | Nov 12 | 228 days | 10 ft |
| Upper Marlboro 3 NNW | Apr 9 | Oct 29 | 203 days | 130 ft |
| Vienna | Apr 8 | Nov 4 | 209 days | 10 ft |
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.