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 95377
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 95377 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Tracy Pumping Plant, CA, is 9 miles from the ZIP's center: its last spring frost comes after January 19 in half of years and after February 17 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 |
|---|---|---|---|---|---|---|
| Tracy Pumping Plant, CA | 9 mi | 61 ft | January 19 | February 17 | December 10 | 9b |
| Tracy, CATracy Carbona | 9 mi | 135 ft | February 25 | April 6 | November 26 | – |
| Livermore station, CA | 16 mi | 393 ft | February 15 | March 13 | December 2 | 9b |
| Livermore, CALivermore Municipal Airport | 16 mi | 393 ft | February 27 | March 29 | December 1 | 9b |
| Stockton, CAStockton Metro Airport | 22 mi | 26 ft | February 6 | February 28 | December 1 | 9b |
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 Tracy Pumping Plant
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 24 | March 1 | February 21 | January 22 | November 29 | November 13 |
| 32°F | February 17 | January 31 | January 19 | December 25 | December 10 | November 26 |
| 28°F (hard freeze) | January 22 | January 9 | January 1 | December 12 | December 22 | December 4 |
| 24°F | January 11 | January 4 | December 31 | December 13 | December 30 | December 10 |
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.