Frost Date Calculator
ZIP 30301.
ZIP 30301 is matched locally to the bundled Census/NOAA station dataset. The rendered matrix result includes the selected station, distance, 32°F probability dates and USDA zone instead of waiting for a browser submit.
ZIP 30301 profile
ZIP 30301 is matched locally to the bundled Census/NOAA station dataset. The rendered matrix result includes the selected station, distance, 32°F probability dates and USDA zone instead of waiting for a browser submit.
- The ZIP centroid record has no automatic station candidates, so the reviewed metro station USW00013874 is applied visibly as an override.
- NOAA 1991–2020 normals are probability references, while USDA hardiness zone is displayed separately and never converted into a frost date.
The selected NOAA 32°F probability dates are placed in 2026. There is a 10% chance the last spring freeze occurs later, and a 10% chance the first fall freeze occurs earlier, than the dates shown.
Context matters.
- Climate normals describe 1991–2020 probability distributions, not this year's weather. Check the current forecast before planting, transplanting or protecting crops.
- Air temperature at a station is not leaf-surface frost. Elevation, slope, urban heat, cold-air drainage and local exposure can move garden conditions materially.
- USDA hardiness zone is shown only as a separate perennial cold-tolerance reference.
Sources & scope
The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.