Frost dates for Aberdeen Phillips Field, MD
At Aberdeen Phillips Field, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Oct 30, for a typical growing season of 201 days. For a 90% chance that the last frost has passed, wait until Apr 30. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 30Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 201 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 9 | Apr 27 | May 12 |
| 32°F | Mar 27 | Apr 10 | Apr 30 |
| 28°F | Mar 13 | Mar 29 | Apr 12 |
| 24°F | Feb 28 | Mar 18 | Mar 31 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 5 | Oct 19 | Nov 1 |
| 32°F | Oct 14 | Oct 30 | Nov 12 |
| 28°F | Oct 28 | Nov 10 | Nov 27 |
| 24°F | Nov 6 | Nov 24 | Dec 13 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 154 days | 175 days | 197 days |
| 32°F | 178 days | 201 days | 221 days |
| 28°F | 206 days | 226 days | 247 days |
| 24°F | 229 days | 251 days | 276 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 21130 | 7b | 5 to 10°F | 2 km |
| 21001 | 7b | 5 to 10°F | 5 km |
| 21005 | 7b | 5 to 10°F | 5 km |
| 21017 | 7b | 5 to 10°F | 6 km |
| 21009 | 7b | 5 to 10°F | 10 km |
| 21078 | 7b | 5 to 10°F | 10 km |
| 21040 | 7b | 5 to 10°F | 11 km |
| 21902 | 7b | 5 to 10°F | 13 km |
| 21015 | 7b | 5 to 10°F | 13 km |
| 21010 | 8a | 10 to 15°F | 14 km |
| 21610 | 7b | 5 to 10°F | 14 km |
| 21085 | 7b | 5 to 10°F | 16 km |
| 21014 | 7b | 5 to 10°F | 17 km |
| 21156 | 7b | 5 to 10°F | 21 km |
| 21087 | 7b | 5 to 10°F | 21 km |
| 21919 | 7b | 5 to 10°F | 21 km |
| 21047 | 7b | 5 to 10°F | 24 km |
| 21913 | 7b | 5 to 10°F | 27 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00013701, at 39.4717, -76.1697, elevation 17 m (57 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 83.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Conowingo Dam (20 km)
- Chestertown (30 km)
- Md Sci Center Baltimore (43 km)
- Cylburn (44 km)
- Baltimore Wash Intl Airport (56 km)
- Stevensville 2sw (57 km)
- Annapolis Naf (60 km)
- Annapolis Police Brks (61 km)
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.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.