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 93551
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 93551 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Palmdale station, CA, is 8 miles from the ZIP's center: its last spring frost comes after March 10 in half of years and after April 11 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Palmdale station, CA | 8 mi | 2,612 ft | March 10 | April 11 | November 19 | – |
| Palmdale, CAPalmdale Airport | 9 mi | 2,524 ft | March 18 | April 11 | November 15 | 8b |
| Lancaster, CA | 11 mi | 2,338 ft | April 3 | April 23 | November 1 | 8a |
| Fairmont, CA | 14 mi | 3,060 ft | April 6 | May 20 | November 29 | 9a |
| Pearblossom, CA | 20 mi | 3,101 ft | March 13 | April 17 | December 1 | 9a |
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 Palmdale station
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) | April 26 | April 14 | April 5 | March 11 | November 7 | October 24 |
| 32°F | April 11 | March 27 | March 10 | February 12 | November 19 | November 3 |
| 28°F (hard freeze) | March 17 | February 25 | February 13 | January 14 | December 1 | November 15 |
| 24°F | February 19 | February 1 | January 15 | December 11 | December 16 | November 23 |
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.