Frost dates for Savage River Dam, MD
At Savage River Dam, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 20, for a typical growing season of 174 days. For a 90% chance that the last frost has passed, wait until May 15. Nearby ZIP codes are in USDA hardiness zones 6a to 7a.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 15Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 174 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 24 | May 8 | May 24 |
| 32°F | Apr 11 | Apr 29 | May 15 |
| 28°F | Mar 27 | Apr 12 | May 1 |
| 24°F | Mar 14 | Mar 31 | Apr 12 |
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 22 | Oct 6 | Oct 21 |
| 32°F | Oct 4 | Oct 20 | Nov 2 |
| 28°F | Oct 16 | Nov 1 | Nov 15 |
| 24°F | Oct 29 | Nov 12 | Nov 30 |
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 | 130 days | 150 days | 172 days |
| 32°F | 151 days | 174 days | 196 days |
| 28°F | 179 days | 203 days | 223 days |
| 24°F | 206 days | 226 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 |
|---|---|---|---|
| 21561 | 6a | -10 to -5°F | 5 km |
| 21523 | 6b | -5 to 0°F | 6 km |
| 21540 | 7a | 0 to 5°F | 8 km |
| 21562 | 6b | -5 to 0°F | 9 km |
| 21521 | 6b | -5 to 0°F | 9 km |
| 21538 | 6a | -10 to -5°F | 13 km |
| 21536 | 6a | -10 to -5°F | 16 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 USC00188065, at 39.5100, -79.1400, elevation 456 m (1,495 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 130.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Sines Deep Creek (23 km)
- Frostburg 2 (24 km)
- Oakland 1 SE (25 km)
- Cumberland 2 (36 km)
- Sharpsburg 5 S (122 km)
- Hagerstown Washington Co Airport (123 km)
- Hagerstown 1 E (124 km)
- Smithsburg 2nw (134 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.