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 85326
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 85326 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Gila Bend, AZ, is 21 miles from the ZIP's center: its last spring frost comes after January 23 in half of years and after February 19 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 |
|---|---|---|---|---|---|---|
| Gila Bend, AZ2 mi SE | 21 mi | 794 ft | January 23 | February 19 | December 11 | 9b |
| Litchfield Park, AZ | 23 mi | 1,040 ft | January 7 | February 5 | December 24 | 9b |
| Laveen (3 mi SSE), AZ | 26 mi | 1,135 ft | January 14 | February 12 | December 22 | 9b |
| Painted Rock Dam, AZ | 28 mi | 568 ft | January 21 | February 18 | December 15 | – |
| Youngtown, AZ | 30 mi | 1,135 ft | January 20 | February 18 | December 15 | 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 Gila Bend
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 5 | February 24 | February 14 | January 18 | November 30 | November 15 |
| 32°F | February 19 | February 2 | January 23 | December 25 | December 11 | November 24 |
| 28°F (hard freeze) | February 1 | January 16 | January 5 | December 13 | December 25 | December 5 |
| 24°F | January 24 | January 13 | January 6 | December 12 | January 4 | December 12 |
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.