Last Frost Day

Last Frost Day

Know when it's safe to plant, by ZIP code

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What is Last Frost Day?

Last Frost Day answers the question every gardener asks: when is it safe to plant? Most frost-date sites give one average date, which frost beats in about half of all years. Enter a US ZIP code and Last Frost Day shows the full range instead: the chance of frost after each spring date and before each fall date, plus your USDA hardiness zone. Dates come from NOAA NCEI's 1991 to 2020 U.S. Climate Normals for the nearest weather stations, and zones from the PRISM Climate Group at Oregon State University. Station pages show the daily record behind the numbers, and articles cover frost dates by state and city, frost odds after any date, growing season length and fall planting countdowns. Free, no account needed.
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