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 92584
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 92584 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Lake Elsinore, CA, is 10 miles from the ZIP's center: its last spring frost comes after January 28 in half of years and after February 27 in one year in ten. By the USDA's method its plant hardiness zone is 9b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Lake Elsinore, CAElsinore | 10 mi | 1,268 ft | January 28 | February 27 | December 18 | 9b |
| San Jacinto, CA | 15 mi | 1,525 ft | January 31 | February 28 | December 10 | 9b |
| Fallbrook, CA5 mi NE | 15 mi | 1,140 ft | February 2 | February 24 | January 30 | – |
| Hemet, CA | 17 mi | 1,811 ft | January 10 | February 25 | December 23 | 9b |
| Riverside Fire Station 3, CA | 23 mi | 840 ft | January 9 | February 25 | December 25 | – |
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 Lake Elsinore
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 2 | March 12 | February 28 | January 29 | December 2 | November 15 |
| 32°F | February 27 | February 10 | January 28 | December 24 | December 18 | December 1 |
| 28°F (hard freeze) | February 9 | January 13 | January 1 | December 12 | December 27 | December 9 |
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.