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 74011
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 74011 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Bixby, OK, is 4 miles from the ZIP's center: its last spring frost comes after April 1 in half of years and after April 20 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Bixby, OK | 4 mi | 605 ft | April 1 | April 20 | November 1 | – |
| Tulsa R.L. Jones Jr. Airport, OK | 11 mi | 638 ft | March 30 | April 17 | November 4 | 7b |
| Tulsa, OKTulsa International Airport | 16 mi | 650 ft | March 31 | April 15 | November 4 | 7b |
| Wagoner, OK | 24 mi | 590 ft | March 29 | April 14 | November 5 | – |
| Claremore, OK2 mi ENE | 27 mi | 588 ft | April 7 | April 24 | October 30 | 7a |
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 Bixby
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) | April 29 | April 21 | April 13 | March 27 | October 22 | October 8 |
| 32°F | April 20 | April 8 | April 1 | March 12 | November 1 | October 16 |
| 28°F (hard freeze) | April 7 | March 27 | March 17 | February 28 | November 9 | October 26 |
| 24°F | March 25 | March 13 | March 6 | February 17 | November 20 | November 2 |
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.