Frost dates for 17307Biglerville, PA
The average last spring frost in Biglerville is April 15 and the average first fall frost is October 27, giving a typical growing season of about 194 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 15
- Average first fall frost
- Oct 27
- Growing season
- 194 days
Safer after May 4 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
Last frost typically in 164 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 15 · Apr 30 · May 18 | Oct 3 · Oct 15 · Oct 28 | 170 days | 100% |
| Frost / freeze (32°F) | Apr 1 · Apr 15 · May 4 | Oct 11 · Oct 27 · Nov 10 | 194 days | 100% |
| Hard freeze (28°F) | Mar 21 · Apr 3 · Apr 17 | Oct 26 · Nov 8 · Nov 23 | 217 days | 100% |
Planting calendar for Biglerville
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 15 – May 21 |
| Tomatoes | Transplant outdoors | May 1 – Jul 7 |
| Peppers | Start seeds indoors | Mar 15 – Apr 15 |
| Peppers | Transplant outdoors | May 15 – Jun 15 |
| Eggplant | Start seeds indoors | Apr 1 – Apr 30 |
| Eggplant | Transplant outdoors | May 15 – Jun 15 |
| Cucumbers | Sow outdoors | May 15 – Jul 17 |
| Summer squash | Sow outdoors | May 1 – Jun 15 |
| Winter squash & pumpkins | Sow outdoors | May 15 – Jun 15 |
| Snap beans | Sow outdoors | May 1 – Aug 9 |
| Sweet corn | Sow outdoors | May 1 – Jul 7 |
| Watermelon & cantaloupe | Sow outdoors | May 15 – Jun 15 |
| Okra | Sow outdoors | May 8 – May 31 |
| Peas | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Potatoes | Plant outdoors (spring) | Mar 15 – May 15 |
| Onions | Start seeds indoors (spring) | Feb 1 – Feb 28 |
| Onions | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (spring) | Feb 25 – Mar 31 |
| Broccoli | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (fall) | Jun 27 – Jul 7 |
| Broccoli | Transplant outdoors (fall) | Jul 27 – Aug 7 |
| Cabbage | Start seeds indoors (spring) | Feb 15 – Mar 15 |
| Cabbage | Transplant outdoors (spring) | Mar 15 – Apr 15 |
| Cabbage | Start seeds indoors (fall) | Jun 17 – Jul 17 |
| Cabbage | Transplant outdoors (fall) | Jul 17 – Aug 17 |
| Leaf lettuce | Sow outdoors (spring) | Mar 15 – May 31 |
| Leaf lettuce | Sow outdoors (fall) | Jul 17 – Sep 2 |
| Spinach | Sow outdoors (spring) | Mar 8 – Apr 21 |
| Spinach | Sow outdoors (fall) | Aug 3 – Sep 7 |
| Radishes | Sow outdoors (spring) | Mar 15 – May 5 |
| Radishes | Sow outdoors (fall) | Jul 17 – Sep 17 |
| Kale | Sow outdoors (spring) | Apr 1 – Apr 21 |
| Kale | Sow outdoors (fall) | Jul 10 – Aug 17 |
| Carrots | Sow outdoors (spring) | Apr 15 – May 31 |
| Carrots | Sow outdoors (fall) | Jun 17 – Aug 2 |
| Garlic | Plant outdoors (fall) | Oct 17 – Nov 17 |
Where these dates come from
ZIP code 17307 is matched to the NOAA station Biglerville, PA, 3 km away, at 720 ft elevation (57 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Biglerville, PA (used) | 720 ft | Apr 15 | Oct 27 |
| Cashtown 1S, PA | 710 ft | Apr 28 | Oct 17 |
| Eisenhower Nhs, PA | 540 ft | Apr 24 | Oct 21 |
| S Mtn, PA | 1,520 ft | Apr 27 | Oct 20 |
Frost dates near Biglerville
- Arendtsville, PA 17303 · last Apr 15, first Oct 27
- Bendersville, PA 17306 · last Apr 15, first Oct 27
- Cashtown, PA 17310 · last Apr 15, first Oct 27
- Peach Glen, PA 17375 · last Apr 15, first Oct 27
- Aspers, PA 17304 · last Apr 15, first Oct 27
- Mc Knightstown, PA 17343 · last Apr 15, first Oct 27
- Orrtanna, PA 17353 · last Apr 15, first Oct 27
- Gettysburg, PA 17325 · last Apr 24, first Oct 21
Frequently asked questions
- When is the last frost in Biglerville, PA?
- For ZIP code 17307, the average last spring frost (32°F) is April 15, based on NOAA 1991-2020 climate normals for the Biglerville, PA weather station. There is a 1-in-10 chance of a frost after May 4.
- When is the first frost in Biglerville, PA?
- The average first fall frost (32°F) is October 27. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 17307?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 194 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.