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 23459
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 23459 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Norfolk, VA, is 1 miles from the ZIP's center: its last spring frost comes after March 17 in half of years and after March 31 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 |
|---|---|---|---|---|---|---|
| Norfolk, VANorfolk International Airport | 1 mi | 30 ft | March 17 | March 31 | November 23 | 8b |
| Norfolk S, VA | 4 mi | 10 ft | March 23 | April 6 | November 16 | 8b |
| Norfolk Naval Air Station, VA | 7 mi | 17 ft | March 16 | April 1 | November 26 | – |
| Virginia Beach, VAOceana Naval Air Station | 10 mi | 23 ft | March 29 | April 11 | November 12 | 8a |
| Hampton, VALangley Air Force Base | 15 mi | 10 ft | March 24 | April 6 | November 15 | – |
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 Norfolk
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 12 | April 4 | March 30 | March 14 | November 11 | October 31 |
| 32°F | March 31 | March 23 | March 17 | February 27 | November 23 | November 8 |
| 28°F (hard freeze) | March 20 | March 12 | March 4 | February 10 | December 8 | November 19 |
| 24°F | March 7 | February 27 | February 17 | January 20 | December 29 | 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.