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 55044
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 55044 in zone 4b (the coldest night of a typical year: -25 to -20°F).
The nearest station, Farmington, MN, is 6 miles from the ZIP's center: its last spring frost comes after April 27 in half of years and after May 10 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 |
|---|---|---|---|---|---|---|
| Farmington, MN3 mi NW | 6 mi | 980 ft | April 27 | May 10 | October 10 | 5a |
| Rosemount, MNRosemount Research & Outreach Center | 10 mi | 945 ft | May 2 | May 16 | October 5 | 4b |
| Eden Prairie, MNMinneapolis Flying Cloud Airport | 16 mi | 907 ft | April 23 | May 6 | October 14 | 5a |
| Minneapolis, MNMinneapolis/St Paul Airport | 17 mi | 872 ft | April 23 | May 7 | October 18 | 5a |
| Jordan, MN1 mi SSW | 18 mi | 900 ft | May 2 | May 18 | October 5 | 5a |
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 Farmington
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 21 | May 12 | May 7 | April 23 | October 2 | September 20 |
| 32°F | May 10 | May 2 | April 27 | April 12 | October 10 | September 27 |
| 28°F (hard freeze) | April 29 | April 21 | April 15 | April 2 | October 22 | October 7 |
| 24°F | April 21 | April 11 | April 6 | March 23 | November 2 | October 21 |
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.