Maryland Frost Dates
Maryland has 43 NOAA weather stations with freeze records in the 1991–2020 climate normals. The typical last spring frost ranges from March 22 at Solomons to May 9 at Sines Deep Creek; at half the stations it has come by April 8. The first fall frost typically arrives between October 9 at Oakland 1 Se and November 26 at Solomons, with a median of November 2.
The growing season between the typical frosts runs from 155 days at Sines Deep Creek to 248 days at Solomons; 209 days at the median station.
Every station in Maryland
Typical dates have a 50% chance of a frost after them in spring, and before them in fall; safer dates, 10%. A garden can differ from its nearest station, especially in a valley or on a hillside: see why your garden may differ.
| Station | Elevation | Last frost | Safer | First frost | Safer | Season (days) |
|---|---|---|---|---|---|---|
| Aberdeen Phillips Fld | 57 ft | Apr 10 | Apr 30 | Oct 30 | Oct 14 | 201 |
| Annapolis Naf | 8 ft | Mar 23 | Apr 6 | Nov 20 | Nov 4 | 241 |
| Annapolis Police Brks | 25 ft | Mar 27 | Apr 9 | Nov 13 | Nov 1 | 234 |
| Assateague | 10 ft | Mar 31 | Apr 13 | Nov 15 | Nov 1 | 228 |
| Baltimore Wash Intl Ap | 156 ft | Apr 10 | Apr 25 | Oct 31 | Oct 17 | 204 |
| Beltsville | 145 ft | Apr 10 | May 1 | Nov 1 | Oct 16 | 202 |
| Catoctin Mtn Park | 1,610 ft | Apr 14 | Apr 30 | Oct 30 | Oct 14 | 197 |
| Chestertown | 40 ft | Apr 3 | Apr 16 | Nov 5 | Oct 24 | 217 |
| Conowingo Dam | 40 ft | Apr 3 | Apr 18 | Nov 6 | Oct 26 | 217 |
| Cumberland 2 | 730 ft | Apr 15 | May 5 | Oct 24 | Oct 9 | 190 |
| Cylburn | 235 ft | Apr 2 | Apr 13 | Nov 7 | Oct 27 | 220 |
| Dalecarlia Rsvr | 150 ft | Apr 9 | Apr 26 | Oct 31 | Oct 16 | 202 |
| Damascus 3 Ssw | 700 ft | Apr 14 | May 2 | Oct 29 | Oct 13 | 196 |
| Emmitsburg 2 Se | 403 ft | Apr 22 | May 9 | Oct 20 | Oct 7 | 179 |
| Frederick Police Brks | 380 ft | Apr 2 | Apr 15 | Nov 6 | Oct 23 | 218 |
| Frostburg 2 | 2,170 ft | Apr 29 | May 15 | Oct 18 | Oct 5 | 171 |
| Glenn Dale Bell Stn | 150 ft | Apr 22 | May 9 | Oct 22 | Oct 7 | 183 |
| Hagerstown 1 E | 532 ft | Apr 11 | Apr 27 | Oct 28 | Oct 14 | 199 |
| Hagerstown Washington Co Ap | 698 ft | Apr 7 | Apr 21 | Nov 4 | Oct 22 | 209 |
| Laurel 3 W | 400 ft | Apr 5 | Apr 19 | Nov 9 | Oct 27 | 218 |
| Md Sci Ctr Baltimore | 20 ft | Mar 24 | Apr 4 | Nov 21 | Nov 7 | 244 |
| Mechanicsville 5 Ne | 100 ft | Apr 17 | May 2 | Oct 27 | Oct 12 | 195 |
| Millers 4 Ne | 860 ft | Apr 19 | May 8 | Oct 25 | Oct 8 | 188 |
| Natl Arboretum Dc | 50 ft | Mar 29 | Apr 11 | Nov 8 | Oct 26 | 224 |
| Oakland 1 Se | 2,420 ft | May 6 | May 23 | Oct 9 | Sep 26 | 156 |
| Ocean City Muni Ap | 12 ft | Apr 7 | Apr 23 | Nov 2 | Oct 20 | 209 |
| Oxon Hill | 190 ft | Apr 3 | Apr 15 | Nov 8 | Oct 24 | 217 |
| Patuxent River Nas | 39 ft | Mar 29 | Apr 10 | Nov 15 | Nov 1 | 230 |
| Rockville 1 Ne | 440 ft | Apr 1 | Apr 15 | Nov 6 | Oct 24 | 219 |
| Royal Oak 2 Ssw | 10 ft | Apr 1 | Apr 15 | Nov 7 | Oct 24 | 220 |
| Salisbury 2n | 20 ft | Apr 2 | Apr 16 | Nov 10 | Oct 29 | 222 |
| Salisbury Wicomico Rgnl Ap | 48 ft | Apr 10 | Apr 30 | Oct 30 | Oct 15 | 201 |
| Salisbury | 10 ft | Apr 3 | Apr 25 | Nov 7 | Oct 27 | 217 |
| Savage Rvr Dam | 1,495 ft | Apr 29 | May 15 | Oct 20 | Oct 4 | 174 |
| Sharpsburg 5 S | 400 ft | Apr 26 | May 15 | Oct 18 | Oct 5 | 175 |
| Sines Deep Creek | 2,040 ft | May 9 | May 30 | Oct 11 | Sep 27 | 155 |
| Smithsburg 2nw | 670 ft | Apr 25 | May 11 | Oct 19 | Oct 6 | 176 |
| Snow Hill 4 N | 30 ft | Apr 10 | Apr 28 | Oct 31 | Oct 16 | 202 |
| Solomons | 12 ft | Mar 22 | Apr 5 | Nov 26 | Nov 10 | 248 |
| St Inigoes Webster Nolf | 21 ft | Mar 30 | Apr 11 | Nov 14 | Oct 29 | 229 |
| Stevensville 2sw | 10 ft | Mar 29 | Apr 8 | Nov 12 | Oct 29 | 228 |
| Upper Marlboro 3 Nnw | 130 ft | Apr 9 | Apr 24 | Oct 29 | Oct 14 | 203 |
| Vienna | 10 ft | Apr 8 | Apr 23 | Nov 4 | Oct 22 | 209 |
Plan your garden with these dates
Enter your ZIP code in the planner: it picks the nearest of these stations and dates every crop in your beds from its frosts. Free, in your browser.
Questions
When is the last frost in Maryland?
It depends on where you are. The typical last spring frost at Maryland's NOAA stations ranges from March 22 to May 9, and half of them have had it by April 8. Enter your ZIP code above for the station nearest you.
When is the first frost in Maryland?
Typically between October 9 and November 26, depending on the station; the median is November 2. Plan fall crops back from your own station's date.
What do "typical" and "safer" mean?
With the typical (50%) last-frost date, half of years still have a frost after it. With the safer (10%) date, only one year in ten does. In fall it's the other way around: the safer date is the earlier one.
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