Frost dates by ZIP code

Enter a U.S. ZIP code to see when the last spring frost and first fall frost usually happen near you, as probabilities rather than a single average date, along with your USDA hardiness zone.

How to read the results

A frost date is not a fixed day. In some years the last spring freeze comes early, in some years late. NOAA's 1991–2020 Climate Normals publish, for each weather station, the dates by which the last spring freeze and first fall freeze happen with 10% to 90% probability. We show those numbers for the station nearest your ZIP code.

• Spring: "10% chance of a freeze after Apr 25" means that in about 1 year out of 10, the last 32°F night came after April 25.
• Fall: "10% chance of a freeze before Oct 24" means that in about 1 year out of 10, the first 32°F night came before October 24.
• 32°F is the usual "frost" threshold for tender plants. 28°F is a hard freeze that can damage hardier crops. 36°F is a cautious margin, because frost can form on plants when the official air temperature is a few degrees above freezing.

Details, sources and limitations are on the methodology page.

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