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 93306
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 93306 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Bakersfield, CA, is 16 miles from the ZIP's center: its last spring frost comes after January 17 in half of years and after February 18 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 |
|---|---|---|---|---|---|---|
| Bakersfield, CABakersfield Airport | 16 mi | 489 ft | January 17 | February 18 | December 15 | 9b |
| Oildale, CABakersfield (5 mi NW) | 16 mi | 470 ft | January 31 | February 27 | December 8 | – |
| Glennville, CA | 18 mi | 3,140 ft | May 11 | June 6 | October 17 | 8a |
| Shafter, CA6 mi E | 21 mi | 404 ft | February 20 | March 9 | November 23 | – |
| Loraine (5 mi NNE), CA | 22 mi | 4,235 ft | April 22 | May 14 | November 13 | – |
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 Bakersfield
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 26 | March 3 | February 21 | January 19 | December 1 | November 16 |
| 32°F | February 18 | January 31 | January 17 | December 23 | December 15 | November 30 |
| 28°F (hard freeze) | January 23 | January 10 | January 2 | December 14 | 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.