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 95054
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 95054 in zone 10a (the coldest night of a typical year: 30 to 35°F).
The nearest station, San Jose, CA, is 3 miles from the ZIP's center: its last spring frost comes after January 12 in half of years and after February 14 in one year in ten. 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 |
|---|---|---|---|---|---|---|
| San Jose, CA | 3 mi | 51 ft | January 12 | February 14 | December 22 | 10a |
| San Jose station, CA | 5 mi | 67 ft | January 2 | January 23 | December 25 | – |
| Sunnyvale, CAMoffett Federal Airfield | 5 mi | 39 ft | January 6 | February 4 | December 23 | 10a |
| Newark, CA | 9 mi | 10 ft | January 1 | January 22 | December 27 | 10a |
| Palo Alto, CA | 10 mi | 25 ft | February 1 | March 4 | December 7 | – |
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 San Jose
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 25 | February 12 | January 11 | December 3 | November 17 |
| 32°F | February 14 | January 26 | January 12 | December 20 | December 22 | December 1 |
| 28°F (hard freeze) | January 17 | January 5 | December 31 | December 10 | December 28 | December 6 |
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.