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 93003
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 93003 in zone 10a (the coldest night of a typical year: 30 to 35°F).
The nearest station, Camarillo, CA, is 9 miles from the ZIP's center: a night at 32°F or colder comes there in only 29% of years, and NOAA's median date of the last spring frost is December 31. By the USDA's method its plant hardiness zone is 10a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Camarillo, CACamarillo Airport | 9 mi | 77 ft | December 31 | February 2 | December 28 | 10a |
| Ojai, CA | 11 mi | 745 ft | March 21 | April 15 | November 15 | 9a |
| Point Mugu NF, CA | 13 mi | 13 ft | December 29 | January 15 | December 24 | 10a |
| Santa Barbara station, CA | 28 mi | 16 ft | January 13 | February 24 | January 6 | – |
| Gibraltar Dam #2, CA | 31 mi | 1,558 ft | March 20 | April 16 | November 27 | – |
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 Camarillo
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) | March 9 | February 18 | February 1 | December 24 | December 17 | November 27 |
| 32°F | February 2 | January 11 | December 31 | December 11 | December 28 | December 7 |
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.