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 66044
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 66044 in zone 6b (the coldest night of a typical year: -5 to 0°F).
The nearest station, Lawrence, KS, is 2 miles from the ZIP's center: its last spring frost comes after April 21 in half of years and after May 6 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 |
|---|---|---|---|---|---|---|
| Lawrence, KSLawrence Municipal Airport | 2 mi | 832 ft | April 21 | May 6 | October 17 | 6a |
| Lawrence station, KS | 6 mi | 1,050 ft | April 12 | April 24 | October 28 | 6b |
| Clinton Lake, KS | 9 mi | 980 ft | April 15 | May 1 | October 22 | – |
| Perry, KSPerry Lake | 12 mi | 957 ft | April 13 | April 30 | October 24 | 6a |
| Oskaloosa, KS4 mi NE | 15 mi | 1,109 ft | April 16 | April 29 | October 22 | 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 Lawrence
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 13 | May 5 | April 30 | April 16 | October 6 | September 20 |
| 32°F | May 6 | April 28 | April 21 | April 5 | October 17 | September 29 |
| 28°F (hard freeze) | April 27 | April 17 | April 10 | March 25 | October 27 | October 11 |
| 24°F | April 16 | April 6 | March 31 | March 13 | November 3 | October 22 |
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.