Frost dates for Oxon Hill, MD
At Oxon Hill, the median last spring frost (32°F) is Apr 3 and the median first fall frost is Nov 8, for a typical growing season of 217 days. For a 90% chance that the last frost has passed, wait until Apr 15. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Apr 3Last spring frost (median)50% chance of 32°F after this date
- Apr 15Safer planting date10% chance of 32°F after this date
- Nov 8First fall frost (median)50% chance of 32°F by this date
- 217 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 1 | Apr 15 | May 2 |
| 32°F | Mar 19 | Apr 3 | Apr 15 |
| 28°F | Mar 5 | Mar 21 | Apr 3 |
| 24°F | Feb 21 | Mar 11 | Mar 26 |
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 14 | Oct 27 | Nov 10 |
| 32°F | Oct 24 | Nov 8 | Nov 23 |
| 28°F | Nov 5 | Nov 19 | Dec 8 |
| 24°F | Nov 17 | Dec 5 | Dec 25 |
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 | 174 days | 195 days | 212 days |
| 32°F | 200 days | 217 days | 240 days |
| 28°F | 223 days | 244 days | 268 days |
| 24°F | 248 days | 270 days | 294 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 |
|---|---|---|---|
| 20745 | 8a | 10 to 15°F | 1 km |
| 20744 | 7b | 5 to 10°F | 6 km |
| 20748 | 7b | 5 to 10°F | 6 km |
| 22307 | 8a | 10 to 15°F | 6 km |
| 20746 | 7b | 5 to 10°F | 8 km |
| 22308 | 8a | 10 to 15°F | 9 km |
| 20735 | 7b | 5 to 10°F | 9 km |
| 22306 | 7b | 5 to 10°F | 11 km |
| 22309 | 7b | 5 to 10°F | 13 km |
| 20607 | 7b | 5 to 10°F | 14 km |
| 22315 | 7b | 5 to 10°F | 14 km |
| 20616 | 7b | 5 to 10°F | 17 km |
| 22060 | 7b | 5 to 10°F | 18 km |
| 20603 | 7b | 5 to 10°F | 19 km |
| 20695 | 7b | 5 to 10°F | 23 km |
| 20675 | 7b | 5 to 10°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 USC00186800, at 38.7956, -76.9947, elevation 58 m (190 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 80.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- National Arboretum DC (13 km)
- Dalecarlia Rsvr (19 km)
- Upper Marlboro 3 NNW (21 km)
- Glenn Dale Bell Station (25 km)
- Beltsville (27 km)
- Laurel 3 W (33 km)
- Rockville 1 NE (36 km)
- Mechanicsville 5 NE (41 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.