Frost dates for Fredericksburg Sewage, VA
At Fredericksburg Sewage, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Nov 1, for a typical growing season of 207 days. For a 90% chance that the last frost has passed, wait until Apr 22. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 6Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 207 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 5 | Apr 21 | May 8 |
| 32°F | Mar 23 | Apr 6 | Apr 22 |
| 28°F | Mar 11 | Mar 27 | Apr 8 |
| 24°F | Feb 26 | Mar 15 | Mar 31 |
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 10 | Oct 22 | Nov 3 |
| 32°F | Oct 19 | Nov 1 | Nov 12 |
| 28°F | Oct 30 | Nov 11 | Nov 28 |
| 24°F | Nov 8 | Nov 24 | Dec 12 |
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 | 163 days | 184 days | 203 days |
| 32°F | 187 days | 207 days | 225 days |
| 28°F | 211 days | 230 days | 253 days |
| 24°F | 231 days | 254 days | 279 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 |
|---|---|---|---|
| 22401 | 7b | 5 to 10°F | 3 km |
| 22405 | 7b | 5 to 10°F | 5 km |
| 22407 | 7a | 0 to 5°F | 11 km |
| 22406 | 7a | 0 to 5°F | 15 km |
| 22553 | 7a | 0 to 5°F | 17 km |
| 22551 | 7a | 0 to 5°F | 24 km |
| 22736 | 7a | 0 to 5°F | 25 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 USC00443204, at 38.2875, -77.4508, elevation 18 m (60 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 101.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Corbin (12 km)
- Quantico MCAS (27 km)
- Manassas (50 km)
- Warrenton 3 SE (52 km)
- Louisa (56 km)
- Piedmont Rsch Station (59 km)
- Ashland (59 km)
- Boston 4 SE (63 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.