Observed arrival · 2026-11-03

ZIP Frost Dates, With a Risk Dial

zipfrostdates.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A free U.S. lookup tool for spring and fall frost dates, hardiness zones, and seed-starting dates by ZIP code.

Landing page captured for the 2026-11-03 issue.

For: U.S. gardeners planning frost-sensitive crops
Worth noticing: It flags 211 ZIP codes whose matched NOAA station is more than 40 km away.

Field notes

The calculator combines a ZIP-to-station match with user-selected frost risk and freeze temperature, then applies the seed-packet interval to the spring frost date. The page distinguishes hardiness zones, which it says reflect average extreme winter lows, from frost dates. It identifies its data sources and notes that 211 ZIP codes are matched to stations more than 40 km away, with that distance flagged in the result.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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