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 34606
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 34606 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Spring Hill, FL, is 4 miles from the ZIP's center: its last spring frost comes after February 5 in half of years and after March 5 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Spring Hill, FLWeeki Wachee | 4 mi | 20 ft | February 5 | March 5 | January 1 | – |
| Brooksville, FLBrooksville Hernando County Airport | 9 mi | 77 ft | March 1 | March 27 | December 5 | 9a |
| Brooksville Chinsegut Hill, FL | 17 mi | 240 ft | February 3 | March 3 | January 3 | 9b |
| St. Leo, FLSaint Leo | 22 mi | 190 ft | January 31 | February 28 | January 8 | 9b |
| Tarpon Springs, FLTarpon Springs Sewage Plant | 24 mi | 6 ft | January 20 | February 14 | January 9 | 10a |
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 Spring Hill
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) | March 23 | March 6 | February 23 | January 26 | December 9 | November 11 |
| 32°F | March 5 | February 18 | February 5 | January 6 | January 1 | December 1 |
| 28°F (hard freeze) | February 18 | February 3 | January 24 | December 27 | January 9 | December 13 |
| 24°F | February 14 | January 31 | January 17 | December 27 | January 11 | December 19 |
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.