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 71105
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 71105 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Red River Research Station, LA, is 5 miles from the ZIP's center: its last spring frost comes after March 6 in half of years and after March 26 in one year in ten. By the USDA's method its plant hardiness zone is 8b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Red River Research Station, LA | 5 mi | 155 ft | March 6 | March 26 | November 18 | 8b |
| Shreveport Sthrn Hills, LA | 6 mi | 200 ft | March 12 | April 1 | November 15 | 8b |
| Shreveport Downtown Airport, LA | 6 mi | 179 ft | February 28 | March 19 | November 24 | 9a |
| Shreveport, LAShreveport Airport | 8 mi | 273 ft | March 9 | March 29 | November 18 | 8b |
| Shreveport Weather Office, LA | 8 mi | 274 ft | March 6 | March 29 | November 19 | – |
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 Red River Research Station
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 10 | March 31 | March 22 | February 28 | November 6 | October 23 |
| 32°F | March 26 | March 14 | March 6 | February 15 | November 18 | November 1 |
| 28°F (hard freeze) | March 15 | March 2 | February 22 | January 25 | December 1 | November 10 |
| 24°F | March 3 | February 14 | February 1 | January 1 | December 20 | November 24 |
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.