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 71101
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 71101 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Shreveport Downtown Airport, LA, is 3 miles from the ZIP's center: its last spring frost comes after February 28 in half of years and after March 19 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Shreveport Downtown Airport, LA | 3 mi | 179 ft | February 28 | March 19 | November 24 | 9a |
| Shreveport Weather Office, LA | 7 mi | 274 ft | March 6 | March 29 | November 19 | – |
| Shreveport, LAShreveport Airport | 7 mi | 273 ft | March 9 | March 29 | November 18 | 8b |
| Shreveport Sthrn Hills, LA | 8 mi | 200 ft | March 12 | April 1 | November 15 | 8b |
| Red River Research Station, LA | 9 mi | 155 ft | March 6 | March 26 | November 18 | 8b |
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 Shreveport Downtown Airport
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 3 | March 23 | March 14 | February 24 | November 12 | October 31 |
| 32°F | March 19 | March 7 | February 28 | February 4 | November 24 | November 7 |
| 28°F (hard freeze) | March 7 | February 23 | February 11 | January 16 | December 10 | November 17 |
| 24°F | February 24 | February 7 | January 28 | December 29 | January 2 | December 3 |
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.