Frost dates for Baltimore, Maryland
In a typical year, Baltimore’s last spring frost lands around Mar 24 and the first fall frost around Nov 21, a growing season of about 242 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 8a.
Right now the growing season is open, with about 27 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Mar 8 | Nov 7 |
| 50 percent | Mar 24 | Nov 21 |
| 90 percent | Apr 4 | Dec 8 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Baltimore is typically around 59°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Baltimore
- Radish (Cherry Belle)
- Onion (Vidalia)
- Garlic (Music)
Timing comes from the same temperature engine the app uses, run against Baltimore’s normals for today.
Common questions
When is the last frost in Baltimore, Maryland?
Baltimore’s last spring frost falls around March 24 in a typical year. One year in ten it is done by March 8, and one year in ten frost holds on until April 4. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Baltimore?
The first fall frost arrives around November 21 in a typical year, as early as November 7 in an early year and as late as December 8 in a late one.
How long is the growing season in Baltimore?
About 242 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Baltimore in?
Baltimore is in USDA hardiness zone 8a under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Rockville, MD (around Apr 1 to Nov 6)
- Gaithersburg, MD (around Apr 1 to Nov 6)
- Washington, DC (around Mar 29 to Nov 8)
- Alexandria, VA (around Mar 24 to Nov 18)
- Frederick, MD (around Apr 2 to Nov 6)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
Set up your garden