Frost dates by state

Pick your state for its frost dates and hardiness zones, a page for each of its larger places, and a list of every NOAA weather station in it with frost records. Or look up your ZIP code for the station nearest you.

The dates come from NOAA's U.S. Climate Normals for 1991 to 2020, which cover 7,274 stations in the 50 states, the District of Columbia and Puerto Rico. At 6,948 of them NOAA could put a date on the last spring frost and the first fall frost. At 146, mostly in Florida, Hawaii, Puerto Rico and along the southern coasts, frost is too rare for dates. At 180, high in the mountains or far north, frost is possible in any month.

The table shows the range of typical last-frost dates across each state's stations: the earliest is usually a warm city or coastal spot, the latest a high or northern one. That spread is the reason to use the station nearest you rather than a statewide date.

"Typical" is the date half of years beat, at the station with the earliest and the latest such date in the state. Zones are the range across the state's ZIP codes on the 2023 USDA map.

How the place pages were chosen

There is a page for the largest places in each state, ranked by the Census Bureau's 2025 population estimates, with at least three per state where the data allows. A weather station serves one page at most: when two towns share the nearest station, the larger town gets the page and names the smaller one. A town whose nearest station is more than about 37 miles away, or where frost is too rare for dates, has no page of its own; the ZIP code lookup still covers it. In all, 269 places have pages.

Every page uses the same rules for its planting calendar, so the differences you see between towns are differences in their weather, not in our method. How it works explains the rules.