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 63703
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 63703 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Cape Girardeau, MO, is 4 miles from the ZIP's center: its last spring frost comes after April 5 in half of years and after April 21 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 |
|---|---|---|---|---|---|---|
| Cape Girardeau, MOCape Girardeau Municipal Airport | 4 mi | 336 ft | April 5 | April 21 | October 25 | 7a |
| Jackson, MO | 10 mi | 440 ft | April 7 | April 22 | October 29 | 7a |
| Anna, IL2 mi NNE | 22 mi | 640 ft | April 8 | April 26 | October 29 | – |
| Marble Hill, MO | 24 mi | 390 ft | April 12 | April 28 | October 23 | 6b |
| Advance, MO1 mi S | 24 mi | 360 ft | April 7 | April 21 | October 27 | – |
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 Cape Girardeau
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) | May 1 | April 23 | April 17 | April 2 | October 16 | October 2 |
| 32°F | April 21 | April 12 | April 5 | March 19 | October 25 | October 12 |
| 28°F (hard freeze) | April 11 | April 1 | March 26 | March 7 | November 4 | October 23 |
| 24°F | April 2 | March 21 | March 14 | February 24 | November 16 | 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.