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 93611
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 93611 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Fresno, CA, is 4 miles from the ZIP's center: its last spring frost comes after January 14 in half of years and after February 11 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 |
|---|---|---|---|---|---|---|
| Fresno, CAFresno Yosemite Int'l | 4 mi | 333 ft | January 14 | February 11 | December 14 | 9b |
| Fresno (5 mi NE), CA | 4 mi | 338 ft | January 30 | March 4 | December 11 | – |
| Friant, CAFriant Government Camp | 12 mi | 410 ft | March 9 | April 16 | December 1 | 9b |
| Auberry, CA2 mi NW | 21 mi | 2,090 ft | March 25 | April 22 | December 3 | 9b |
| Madera station, CA | 22 mi | 270 ft | February 18 | March 18 | 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 Fresno
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 13 | February 26 | February 15 | January 19 | December 1 | November 16 |
| 32°F | February 11 | January 29 | January 14 | December 22 | December 14 | November 29 |
| 28°F (hard freeze) | January 24 | January 9 | January 1 | December 13 | December 24 | 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.