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 84043
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 84043 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Saratoga Springs, UT, is 4 miles from the ZIP's center: its last spring frost comes after April 30 in half of years and after May 27 in one year in ten. By the USDA's method its plant hardiness zone is 7a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Saratoga Springs, UTUtah Lake Lehi | 4 mi | 4,505 ft | April 30 | May 27 | October 9 | 7a |
| Draper, UTDraper-Point Of Mountain | 5 mi | 4,506 ft | April 18 | May 6 | October 22 | – |
| Alpine, UT | 7 mi | 5,100 ft | May 3 | May 26 | October 12 | 7a |
| Pleasant Grove, UT | 8 mi | 4,692 ft | April 17 | May 7 | October 25 | 7b |
| Timpanogos Cave, UT | 9 mi | 5,740 ft | May 2 | May 26 | October 16 | – |
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 Saratoga Springs
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) | June 13 | May 31 | May 20 | April 30 | September 28 | September 16 |
| 32°F | May 27 | May 8 | April 30 | April 14 | October 9 | September 26 |
| 28°F (hard freeze) | May 2 | April 22 | April 15 | March 28 | October 22 | October 5 |
| 24°F | April 16 | April 7 | March 30 | March 4 | November 2 | October 16 |
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.