Frost dates for 19056Levittown, PA
The average last spring frost in Levittown is April 21 and the average first fall frost is October 25, giving a typical growing season of about 185 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 21
- Average first fall frost
- Oct 25
- Growing season
- 185 days
Safer after May 7 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
Last frost typically in 169 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 19 · May 3 · May 22 | Oct 1 · Oct 13 · Oct 29 | 162 days | 100% |
| Frost / freeze (32°F) | Apr 6 · Apr 21 · May 7 | Oct 11 · Oct 25 · Nov 5 | 185 days | 100% |
| Hard freeze (28°F) | Mar 24 · Apr 8 · Apr 21 | Oct 20 · Nov 3 · Nov 16 | 209 days | 100% |
Planting calendar for Levittown
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 21 – May 27 |
| Tomatoes | Transplant outdoors | May 7 – Jul 5 |
| Peppers | Start seeds indoors | Mar 21 – Apr 21 |
| Peppers | Transplant outdoors | May 21 – Jun 21 |
| Eggplant | Start seeds indoors | Apr 7 – May 6 |
| Eggplant | Transplant outdoors | May 21 – Jun 21 |
| Cucumbers | Sow outdoors | May 21 – Jul 15 |
| Summer squash | Sow outdoors | May 7 – Jun 21 |
| Winter squash & pumpkins | Sow outdoors | May 21 – Jun 21 |
| Snap beans | Sow outdoors | May 7 – Aug 7 |
| Sweet corn | Sow outdoors | May 7 – Jul 5 |
| Watermelon & cantaloupe | Sow outdoors | May 21 – Jun 21 |
| Okra | Sow outdoors | May 14 – Jun 6 |
| Peas | Sow outdoors (spring) | Mar 21 – May 6 |
| Potatoes | Plant outdoors (spring) | Mar 21 – May 21 |
| Onions | Start seeds indoors (spring) | Feb 7 – Mar 6 |
| Onions | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (spring) | Mar 3 – Apr 6 |
| Broccoli | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (fall) | Jun 25 – Jul 5 |
| Broccoli | Transplant outdoors (fall) | Jul 25 – Aug 5 |
| Cabbage | Start seeds indoors (spring) | Feb 21 – Mar 21 |
| Cabbage | Transplant outdoors (spring) | Mar 21 – Apr 21 |
| Cabbage | Start seeds indoors (fall) | Jun 15 – Jul 15 |
| Cabbage | Transplant outdoors (fall) | Jul 15 – Aug 15 |
| Leaf lettuce | Sow outdoors (spring) | Mar 21 – Jun 6 |
| Leaf lettuce | Sow outdoors (fall) | Jul 15 – Aug 31 |
| Spinach | Sow outdoors (spring) | Mar 14 – Apr 27 |
| Spinach | Sow outdoors (fall) | Aug 1 – Sep 5 |
| Radishes | Sow outdoors (spring) | Mar 21 – May 11 |
| Radishes | Sow outdoors (fall) | Jul 15 – Sep 15 |
| Kale | Sow outdoors (spring) | Apr 7 – Apr 27 |
| Kale | Sow outdoors (fall) | Jul 8 – Aug 15 |
| Carrots | Sow outdoors (spring) | Apr 21 – Jun 6 |
| Carrots | Sow outdoors (fall) | Jun 15 – Jul 31 |
| Garlic | Plant outdoors (fall) | Oct 15 – Nov 15 |
Where these dates come from
ZIP code 19056 is matched to the NOAA station Neshaminy Falls, PA, 6 km away, at 40 ft elevation (29 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Neshaminy Falls, PA (used) | 40 ft | Apr 21 | Oct 25 |
| Philadelphia Ne Ap, PA | 100 ft | Apr 4 | Nov 7 |
| Trenton Mercer Co Ap, NJ | 184 ft | Apr 10 | Nov 1 |
| Trenton State College, NJ | 100 ft | Apr 17 | Oct 28 |
Frost dates near Levittown
- Levittown, PA 19057 · last Apr 21, first Oct 25
- Fairless Hills, PA 19030 · last Apr 21, first Oct 25
- Langhorne, PA 19047 · last Apr 21, first Oct 25
- Bristol, PA 19007 · last Apr 21, first Oct 25
- Bensalem, PA 19020 · last Apr 21, first Oct 25
- Croydon, PA 19021 · last Apr 21, first Oct 25
- Florence, NJ 08518 · last Apr 15, first Oct 29
- Morrisville, PA 19067 · last Apr 10, first Nov 1
Frequently asked questions
- When is the last frost in Levittown, PA?
- For ZIP code 19056, the average last spring frost (32°F) is April 21, based on NOAA 1991-2020 climate normals for the Neshaminy Falls, PA weather station. There is a 1-in-10 chance of a frost after May 7.
- When is the first frost in Levittown, PA?
- The average first fall frost (32°F) is October 25. 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 19056?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 185 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.