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 44507
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 44507 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Warren, OH, is 12 miles from the ZIP's center: its last spring frost comes after May 8 in half of years and after May 25 in one year in ten. By the USDA's method its plant hardiness zone is 6a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Warren, OH3 mi S | 12 mi | 900 ft | May 8 | May 25 | October 12 | 6a |
| Youngstown, OHYoungstown Regional Airport | 12 mi | 1,180 ft | May 1 | May 20 | October 17 | 6b |
| New Castle, PA1 mi N | 16 mi | 825 ft | April 30 | May 19 | October 23 | 6b |
| Mosquito Creek Lake, OH | 17 mi | 910 ft | April 30 | May 16 | October 23 | – |
| Millport (4 mi NE), OH | 24 mi | 1,170 ft | May 2 | May 20 | October 13 | 6a |
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 Warren
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) | June 3 | May 26 | May 19 | May 2 | October 2 | September 19 |
| 32°F | May 25 | May 15 | May 8 | April 23 | October 12 | September 30 |
| 28°F (hard freeze) | May 15 | May 4 | April 27 | April 13 | October 26 | October 8 |
| 24°F | May 1 | April 20 | April 15 | March 30 | November 5 | October 23 |
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.