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 95037
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 95037 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Gilroy, CA, is 11 miles from the ZIP's center: its last spring frost comes after February 24 in half of years and after April 4 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Gilroy, CA | 11 mi | 194 ft | February 24 | April 4 | November 27 | – |
| Watsonville Water Works, CA | 15 mi | 95 ft | January 28 | March 3 | December 13 | 9b |
| Watsonville, CAWatsonville Municipal Airport | 15 mi | 160 ft | January 31 | March 9 | December 9 | 9b |
| Mount Hamilton, CA | 15 mi | 4,206 ft | May 3 | June 5 | November 18 | 9a |
| Los Gatos, CA | 17 mi | 365 ft | February 2 | March 14 | December 6 | – |
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 Gilroy
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) | May 1 | April 15 | April 4 | March 4 | November 10 | October 20 |
| 32°F | April 4 | March 8 | February 24 | January 23 | November 27 | November 10 |
| 28°F (hard freeze) | February 19 | January 31 | January 16 | December 22 | December 12 | November 24 |
| 24°F | January 24 | January 13 | January 4 | December 13 | December 27 | December 8 |
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.