Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 19056
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 19056 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Neshaminy Falls, PA, is 4 miles from the ZIP's center: its last spring frost comes after April 21 in half of years and after May 7 in one year in ten. By the USDA's method its plant hardiness zone is 7a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Neshaminy Falls, PA | 4 mi | 40 ft | April 21 | May 7 | October 25 | 7a |
| Philadelphia NE Airport, PA | 8 mi | 100 ft | April 4 | April 17 | November 7 | 7b |
| Trenton, NJTrenton-Mercer Airport | 10 mi | 184 ft | April 10 | April 25 | November 1 | 7b |
| Trenton State College, NJ | 10 mi | 100 ft | April 17 | May 6 | October 28 | – |
| Philadelphia/Mount Holly Weather Office, NJ | 10 mi | 63 ft | April 15 | April 29 | October 29 | 7a |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Neshaminy Falls
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | May 22 | May 10 | May 3 | April 19 | October 13 | October 1 |
| 32°F | May 7 | April 27 | April 21 | April 6 | October 25 | October 11 |
| 28°F (hard freeze) | April 21 | April 14 | April 8 | March 24 | November 3 | October 20 |
| 24°F | April 12 | April 3 | March 29 | March 12 | November 14 | October 30 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.