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 55317
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 55317 in zone 5a (the coldest night of a typical year: -20 to -15°F).
The nearest station, Chanhassen, MN, is 1 miles from the ZIP's center: its last spring frost comes after April 30 in half of years and after May 15 in one year in ten. By the USDA's method its plant hardiness zone is 4b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Chanhassen, MNChanhassen Weather Office | 1 mi | 946 ft | April 30 | May 15 | October 9 | 4b |
| Eden Prairie, MNMinneapolis Flying Cloud Airport | 4 mi | 907 ft | April 23 | May 6 | October 14 | 5a |
| Chaska, MN2 mi NW | 5 mi | 923 ft | May 5 | May 19 | October 5 | – |
| New Hope, MN | 14 mi | 910 ft | April 29 | May 12 | October 12 | 5a |
| Jordan, MN1 mi SSW | 15 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 Chanhassen
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 24 | May 15 | May 9 | April 27 | September 30 | September 17 |
| 32°F | May 15 | May 6 | April 30 | April 15 | October 9 | September 25 |
| 28°F (hard freeze) | May 4 | April 25 | April 19 | April 4 | October 19 | October 4 |
| 24°F | April 23 | April 15 | April 8 | March 27 | October 29 | October 14 |
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.