Frost dates
Frost dates in Maryland
Typical last spring frost and first fall frost for 43 weather stations across Maryland, from NOAA’s 1991–2020 climate normals.
Last spring frost
Mar 29 – Apr 26
Typical across Maryland (middle: Apr 8)
First fall frost
Oct 19 – Nov 15
Typical across Maryland (middle: Nov 2)
Your own yard can differ by weeks from the nearest town. Get frost dates for your exact spot →
By town
| Station | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Aberdeen Phillips Field | Apr 10 | Oct 30 | 203 |
| Annapolis Naf | Mar 23 | Nov 20 | 242 |
| Annapolis Police Brks | Mar 27 | Nov 13 | 231 |
| Assateague | Mar 31 | Nov 15 | 229 |
| Baltimore Wash International Airport | Apr 10 | Oct 31 | 204 |
| Beltsville | Apr 10 | Nov 1 | 205 |
| Catoctin Mountain Park | Apr 14 | Oct 30 | 199 |
| Chestertown | Apr 3 | Nov 5 | 216 |
| Conowingo Dam | Apr 3 | Nov 6 | 217 |
| Cumberland 2 | Apr 15 | Oct 24 | 192 |
| Cylburn | Apr 2 | Nov 7 | 219 |
| Dalecarlia Reservoir | Apr 9 | Oct 31 | 205 |
| Damascus 3 SSW | Apr 14 | Oct 29 | 198 |
| Emmitsburg 2 SE | Apr 22 | Oct 20 | 181 |
| Frederick Police Brks | Apr 2 | Nov 6 | 218 |
| Frostburg 2 | Apr 29 | Oct 18 | 172 |
| Glenn Dale Bell Station | Apr 22 | Oct 22 | 183 |
| Hagerstown 1 E | Apr 11 | Oct 28 | 200 |
| Hagerstown Washington County Airport | Apr 7 | Nov 4 | 211 |
| Laurel 3 W | Apr 5 | Nov 9 | 218 |
| Md Sci Ctr Baltimore | Mar 24 | Nov 21 | 242 |
| Mechanicsville 5 NE | Apr 17 | Oct 27 | 193 |
| Millers 4 NE | Apr 19 | Oct 25 | 189 |
| Natl Arboretum Dc | Mar 29 | Nov 8 | 224 |
| Oakland 1 SE | May 6 | Oct 9 | 156 |
| Ocean City Municipal Airport | Apr 7 | Nov 2 | 209 |
| Oxon Hill | Apr 3 | Nov 8 | 219 |
| Patuxent River NAS | Mar 29 | Nov 15 | 231 |
| Rockville 1 NE | Apr 1 | Nov 6 | 219 |
| Royal Oak 2 SSW | Apr 1 | Nov 7 | 220 |
| Salisbury | Apr 3 | Nov 7 | 218 |
| Salisbury 2 N | Apr 2 | Nov 10 | 222 |
| Salisbury Wicomico Regional Airport | Apr 10 | Oct 30 | 203 |
| Savage Rvr Dam | Apr 29 | Oct 20 | 174 |
| Sharpsburg 5 S | Apr 26 | Oct 18 | 175 |
| Sines Deep Creek | May 9 | Oct 11 | 155 |
| Smithsburg 2 NW | Apr 25 | Oct 19 | 177 |
| Snow Hill 4 N | Apr 10 | Oct 31 | 204 |
| Solomons | Mar 22 | Nov 26 | 249 |
| St Inigoes Webster Nolf | Mar 30 | Nov 14 | 229 |
| Stevensville 2 SW | Mar 29 | Nov 12 | 228 |
| Upper Marlboro 3 NNW | Apr 9 | Oct 29 | 203 |
| Vienna | Apr 8 | Nov 4 | 210 |
Each date is the median: in half of years the frost comes earlier, in half later. Frost here means a low of 32°F or colder at the station. Low spots and valleys often frost a week or two earlier than these dates; hillsides and city centers later.
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. The Field almanac also shows how often frost comes early or late, and a reanalysis reading for your exact location.