Frost dates for Lancaster 2ne Fltr Plant, PA
At Lancaster 2ne Fltr Plant, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 24, for a typical growing season of 186 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 186 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 19 | May 2 | May 20 |
| 32°F | Apr 5 | Apr 19 | May 7 |
| 28°F | Mar 22 | Apr 5 | Apr 24 |
| 24°F | Mar 8 | Mar 24 | Apr 5 |
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 2 | Oct 13 | Oct 27 |
| 32°F | Oct 9 | Oct 24 | Nov 6 |
| 28°F | Oct 20 | Nov 4 | Nov 20 |
| 24°F | Nov 3 | Nov 18 | Dec 5 |
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 | 144 days | 165 days | 183 days |
| 32°F | 163 days | 186 days | 205 days |
| 28°F | 189 days | 212 days | 234 days |
| 24°F | 219 days | 240 days | 264 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 |
|---|---|---|---|
| 17601 | 7a | 0 to 5°F | 4 km |
| 17602 | 7a | 0 to 5°F | 5 km |
| 17603 | 7a | 0 to 5°F | 5 km |
| 17504 | 7a | 0 to 5°F | 5 km |
| 17576 | 7a | 0 to 5°F | 7 km |
| 17505 | 7a | 0 to 5°F | 7 km |
| 17540 | 7a | 0 to 5°F | 9 km |
| 17584 | 7a | 0 to 5°F | 10 km |
| 17568 | 7a | 0 to 5°F | 12 km |
| 17579 | 7a | 0 to 5°F | 13 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 USC00364763, at 40.0500, -76.2742, elevation 82 m (270 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 111.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lancaster Airport (8 km)
- Landisville 2 NW (15 km)
- Safe Harbor Dam (17 km)
- New Holland 2 SE (17 km)
- Octoraro Lake (34 km)
- Hopewell Morgantown (35 km)
- Lebanon 2 W (35 km)
- Coatesville 2 W (36 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.