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 54302
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 54302 in zone 5b (the coldest night of a typical year: -15 to -10°F).
The nearest station, Green Bay Botanical, WI, is 6 miles from the ZIP's center: its last spring frost comes after May 7 in half of years and after May 22 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Green Bay Botanical, WI | 6 mi | 694 ft | May 7 | May 22 | October 9 | – |
| Green Bay, WIGreen Bay A S International Airport | 7 mi | 682 ft | April 30 | May 16 | October 9 | 5a |
| Ashwaubenon, WIGreen Bay Weather Office | 7 mi | 682 ft | May 1 | May 16 | October 11 | – |
| Denmark, WIDenmark Wastewater Treatment Plant | 13 mi | 811 ft | May 6 | May 20 | October 12 | – |
| Kewaunee, WI | 23 mi | 593 ft | May 1 | May 17 | October 18 | 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 Green Bay Botanical
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 31 | May 24 | May 19 | May 4 | September 28 | September 15 |
| 32°F | May 22 | May 13 | May 7 | April 24 | October 9 | September 23 |
| 28°F (hard freeze) | May 12 | May 2 | April 27 | April 10 | October 25 | October 5 |
| 24°F | April 27 | April 19 | April 12 | March 30 | November 6 | October 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.