Frost dates for Stevensville 2sw, MD
At Stevensville 2sw, the median last spring frost (32°F) is Mar 29 and the median first fall frost is Nov 12, for a typical growing season of 228 days. For a 90% chance that the last frost has passed, wait until Apr 8. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Mar 29Last spring frost (median)50% chance of 32°F after this date
- Apr 8Safer planting date10% chance of 32°F after this date
- Nov 12First fall frost (median)50% chance of 32°F by this date
- 228 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 | Mar 28 | Apr 7 | Apr 21 |
| 32°F | Mar 15 | Mar 29 | Apr 8 |
| 28°F | Mar 4 | Mar 18 | Mar 31 |
| 24°F | Feb 21 | Mar 9 | Mar 24 |
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 17 | Nov 1 | Nov 15 |
| 32°F | Oct 29 | Nov 12 | Nov 29 |
| 28°F | Nov 8 | Nov 25 | Dec 14 |
| 24°F | Nov 20 | Dec 10 | Jan 1 |
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 | 187 days | 207 days | 225 days |
| 32°F | 209 days | 228 days | 250 days |
| 28°F | 231 days | 252 days | 275 days |
| 24°F | 251 days | 277 days | 301 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 |
|---|---|---|---|
| 21666 | 8a | 10 to 15°F | 4 km |
| 21619 | 8a | 10 to 15°F | 7 km |
| 21638 | 8a | 10 to 15°F | 12 km |
| 21658 | 8a | 10 to 15°F | 17 km |
| 21661 | 8a | 10 to 15°F | 17 km |
| 21679 | 7b | 5 to 10°F | 22 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 USC00188557, at 38.9719, -76.3381, elevation 3 m (10 ft).
- Data quality: Representative (10+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 64.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Annapolis Naf (11 km)
- Annapolis Police Brks (15 km)
- Royal Oak 2 SSW (31 km)
- Chestertown (37 km)
- Baltimore Wash Intl Airport (37 km)
- Upper Marlboro 3 NNW (40 km)
- Glenn Dale Bell Station (40 km)
- Md Sci Center Baltimore (42 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.