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 92657
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 92657 in zone 10b (the coldest night of a typical year: 35 to 40°F).
The nearest station, Laguna Beach, CA, is 4 miles from the ZIP's center: a night at 32°F or colder comes there in only 20% of years, and NOAA's median date of the last spring frost is January 6.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Laguna Beach, CA | 4 mi | 44 ft | January 6 | February 11 | January 2 | – |
| Tustin, CATustin Irvine Ranch | 9 mi | 235 ft | January 5 | February 2 | December 25 | – |
| Lake Elsinore, CAElsinore | 29 mi | 1,268 ft | January 28 | February 27 | December 18 | 9b |
| Chino, CAChino Airport | 29 mi | 650 ft | January 17 | February 22 | December 19 | 9b |
| Torrance, CATorrance Airport | 33 mi | 90 ft | January 9 | February 24 | January 5 | 10b |
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 Laguna Beach
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) | February 28 | February 14 | January 30 | December 26 | December 26 | December 1 |
| 32°F | February 11 | January 21 | January 6 | December 13 | January 2 | December 12 |
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.