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 68022
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 68022 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Valley, NE, is 7 miles from the ZIP's center: its last spring frost comes after April 15 in half of years and after April 29 in one year in ten. By the USDA's method its plant hardiness zone is 5b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Valley, NEValley NWS | 7 mi | 1,145 ft | April 15 | April 29 | October 21 | 5b |
| Gretna, NE4 mi NE | 9 mi | 1,240 ft | April 21 | May 4 | October 18 | 6a |
| Omaha #1, NE | 13 mi | 1,280 ft | April 16 | May 6 | October 18 | – |
| Fort Calhoun, NE4 mi W | 14 mi | 1,310 ft | April 19 | May 6 | October 17 | – |
| Mead, NE6 mi S | 15 mi | 1,155 ft | April 25 | May 7 | October 13 | 5b |
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 Valley
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 7 | May 1 | April 25 | April 12 | October 12 | September 27 |
| 32°F | April 29 | April 21 | April 15 | April 2 | October 21 | October 6 |
| 28°F (hard freeze) | April 20 | April 11 | April 5 | March 22 | October 31 | October 17 |
| 24°F | April 10 | April 2 | March 28 | March 11 | November 8 | October 25 |
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.