Frost dates for Emmitsburg 2 SE, MD
At Emmitsburg 2 SE, the median last spring frost (32°F) is Apr 22 and the median first fall frost is Oct 20, for a typical growing season of 179 days. For a 90% chance that the last frost has passed, wait until May 9. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 22Last spring frost (median)50% chance of 32°F after this date
- May 9Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 179 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 20 | May 4 | May 22 |
| 32°F | Apr 7 | Apr 22 | May 9 |
| 28°F | Mar 28 | Apr 9 | Apr 25 |
| 24°F | Mar 12 | Mar 30 | Apr 13 |
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 | Sep 30 | Oct 10 | Oct 23 |
| 32°F | Oct 7 | Oct 20 | Nov 2 |
| 28°F | Oct 13 | Oct 31 | Nov 13 |
| 24°F | Oct 27 | Nov 10 | Nov 27 |
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 | 136 days | 157 days | 178 days |
| 32°F | 158 days | 179 days | 200 days |
| 28°F | 182 days | 203 days | 223 days |
| 24°F | 204 days | 227 days | 251 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 |
|---|---|---|---|
| 21727 | 7a | 0 to 5°F | 4 km |
| 21778 | 7a | 0 to 5°F | 8 km |
| 21757 | 7a | 0 to 5°F | 9 km |
| 21787 | 7a | 0 to 5°F | 10 km |
| 21798 | 7a | 0 to 5°F | 15 km |
| 21791 | 7a | 0 to 5°F | 18 km |
| 21776 | 7a | 0 to 5°F | 24 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 USC00182906, at 39.6761, -77.2844, elevation 123 m (403 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 114.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Catoctin Mountain Park (17 km)
- Smithsburg 2nw (26 km)
- Frederick Police Brks (32 km)
- Hagerstown 1 E (36 km)
- Hagerstown Washington Co Airport (38 km)
- Millers 4 NE (41 km)
- Damascus 3 SSW (46 km)
- Sharpsburg 5 S (49 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.