Frost dates for Biglerville, PA
At Biglerville, the median last spring frost (32°F) is Apr 15 and the median first fall frost is Oct 27, for a typical growing season of 194 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 15Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 194 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 15 | Apr 30 | May 18 |
| 32°F | Apr 1 | Apr 15 | May 4 |
| 28°F | Mar 21 | Apr 3 | Apr 17 |
| 24°F | Mar 8 | Mar 23 | Apr 6 |
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 3 | Oct 15 | Oct 28 |
| 32°F | Oct 11 | Oct 27 | Nov 10 |
| 28°F | Oct 26 | Nov 8 | Nov 23 |
| 24°F | Nov 6 | Nov 20 | Dec 7 |
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 | 148 days | 170 days | 190 days |
| 32°F | 172 days | 194 days | 215 days |
| 28°F | 198 days | 217 days | 237 days |
| 24°F | 220 days | 240 days | 263 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 |
|---|---|---|---|
| 17303 | 7a | 0 to 5°F | 4 km |
| 17304 | 7a | 0 to 5°F | 5 km |
| 17306 | 7a | 0 to 5°F | 5 km |
| 17307 | 7a | 0 to 5°F | 6 km |
| 17324 | 7a | 0 to 5°F | 11 km |
| 17372 | 7a | 0 to 5°F | 14 km |
| 17065 | 7a | 0 to 5°F | 15 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 USC00360656, at 39.9347, -77.2547, elevation 220 m (720 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 115.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cashtown 1s (10 km)
- Eisenhower Nhs (15 km)
- S Mountain (23 km)
- Hanover 4 SW (26 km)
- Shippensburg (27 km)
- York Airport (32 km)
- Chambersburg 1 ESE (33 km)
- Carlisle Water Plant (33 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.