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 49006
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 49006 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Kalamazoo, MI, is 6 miles from the ZIP's center: its last spring frost comes after April 28 in half of years and after May 13 in one year in ten. By the USDA's method its plant hardiness zone is 6a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Kalamazoo, MIKalamazoo Battle Creek International Airport | 6 mi | 868 ft | April 28 | May 13 | October 18 | 6a |
| Gull Lake Biological Station, MI | 14 mi | 925 ft | April 29 | May 18 | October 20 | – |
| Bloomingdale, MI | 18 mi | 736 ft | May 7 | May 22 | October 11 | – |
| Battle Creek, MIBattle Creek Kellogg Airport | 19 mi | 928 ft | April 30 | May 17 | October 19 | 6a |
| Battle Creek (5 mi NW), MI | 19 mi | 923 ft | May 6 | May 23 | October 12 | 6a |
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 Kalamazoo
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 24 | May 15 | May 8 | April 24 | October 6 | September 22 |
| 32°F | May 13 | May 4 | April 28 | April 13 | October 18 | October 2 |
| 28°F (hard freeze) | May 3 | April 23 | April 17 | April 3 | November 1 | October 16 |
| 24°F | April 20 | April 10 | April 5 | March 23 | November 13 | November 1 |
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.