Frost Date Calculator
ZIP 90001.
ZIP 90001 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 90001 profile
ZIP 90001 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 is a local lookup key, not a weather station; the nearest representative station can be overridden.
- NOAA 1991–2020 normals are probability references, while USDA hardiness zone is displayed separately and never converted into a frost date.
NOAA's 10% 1991–2020 normal reports a 365-day freeze-free period for the selected station. This is a climate normal, not a guarantee for 2026.
Context matters.
- A 365-day normal does not rule out an unusual cold event. Check the current National Weather Service forecast before planting or protecting sensitive plants.
- Nearby inland, low-lying or higher-elevation sites can freeze even when the selected station does not.
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.