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 04057
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 04057 in zone 5a (the coldest night of a typical year: -20 to -15°F).
The nearest station, Bridgton, ME, is 3 miles from the ZIP's center: its last spring frost comes after May 5 in half of years and after May 17 in one year in ten. By the USDA's method its plant hardiness zone is 5a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Bridgton, ME3 mi NW | 3 mi | 508 ft | May 5 | May 17 | October 5 | 5a |
| Fryeburg, MEFryeburg E Slopes Airport | 14 mi | 445 ft | May 17 | June 1 | September 25 | 4b |
| East Hiram, ME | 15 mi | 528 ft | May 12 | May 25 | October 1 | 5a |
| Bethel, ME6 mi SSE | 16 mi | 790 ft | May 6 | May 19 | October 2 | – |
| Poland, ME | 18 mi | 570 ft | May 3 | May 16 | October 7 | 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 Bridgton
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 1 | May 23 | May 18 | May 5 | September 27 | September 12 |
| 32°F | May 17 | May 10 | May 5 | April 26 | October 5 | September 22 |
| 28°F (hard freeze) | May 4 | April 30 | April 25 | April 13 | October 19 | October 1 |
| 24°F | April 23 | April 17 | April 12 | April 3 | November 1 | October 15 |
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.