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 60087
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 60087 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Chicago Waukegan Regional Airport, IL, is 1 miles from the ZIP's center: its last spring frost comes after April 30 in half of years and after May 16 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 |
|---|---|---|---|---|---|---|
| Chicago Waukegan Regional Airport, IL | 1 mi | 727 ft | April 30 | May 16 | October 21 | 6a |
| Waukegan, IL | 4 mi | 700 ft | April 30 | May 14 | October 19 | – |
| Lake Villa, IL2 mi NE | 11 mi | 840 ft | April 24 | May 9 | October 23 | 5b |
| Kenosha station, WI | 11 mi | 600 ft | April 19 | May 3 | October 26 | 6a |
| Antioch, IL | 14 mi | 750 ft | April 23 | May 9 | October 21 | – |
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 Chicago Waukegan Regional Airport
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 27 | May 19 | May 12 | April 28 | October 10 | September 25 |
| 32°F | May 16 | May 6 | April 30 | April 14 | October 21 | October 5 |
| 28°F (hard freeze) | May 2 | April 23 | April 16 | April 2 | November 1 | October 15 |
| 24°F | April 20 | April 9 | April 3 | March 20 | November 11 | October 31 |
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.