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 19103
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 19103 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Phila Franklin Inst, PA, is 0 miles from the ZIP's center: its last spring frost comes after March 30 in half of years and after April 12 in one year in ten. By the USDA's method its plant hardiness zone is 7b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Phila Franklin Inst, PA | 0 mi | 60 ft | March 30 | April 12 | November 17 | 7b |
| Philadelphia, PAPhiladelphia International Airport | 7 mi | 10 ft | April 2 | April 13 | November 10 | 7b |
| Pennsauken (1 mi N), NJ | 8 mi | 46 ft | April 15 | May 1 | October 31 | 7b |
| Moorestown-Lenola, NJMoorestown | 11 mi | 45 ft | April 12 | May 3 | November 1 | 7b |
| Philadelphia NE Airport, PA | 12 mi | 100 ft | April 4 | April 17 | November 7 | 7b |
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 Phila Franklin Inst
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) | April 23 | April 15 | April 8 | March 27 | November 5 | October 23 |
| 32°F | April 12 | April 4 | March 30 | March 15 | November 17 | November 4 |
| 28°F (hard freeze) | March 31 | March 23 | March 17 | March 1 | November 29 | November 12 |
| 24°F | March 22 | March 14 | March 8 | February 18 | December 14 | November 24 |
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.