Frost Dates for the USA

Dates of the First and Last Frosts in the USA

Dates are given based upon when a 50% chance that the first or last frost of the year has occurred.

If you want to be conservative or take a risk then add or subtract an extra two weeks to the date of the first or last frosts.

Frost Dates
Flower in the frost by Gabriel Anast.

Early = 1st to 10th of the month
Mid = 11th to 20th of the month
Late = 21st to 31st of the month

Frost times for the United States of America
Brought to you by GardenersHQ
Average date of last frost
Average date of first frost
Alabama Birmingham Early April Early November
  Montgomery Mid March Mid November
  Mobile Late Feburary Late November
  Tuscaloosa Early April Early November
Alaska Anchorage Mid May Late September
  Faibanks Mid May Early September
Arizona Phoenix Mid December Late January
  Tucson Mid Feburary Late November
  Chandler Mid Feburary Late November
Arkansas Little Rock Late March Mid November
  Fort Smith Late March Late October
California Los Angeles No frost likely No frost likely
  San Francisco Late January (10% chance of frost) Mid December (10% chance of frost)
  Sacramento Mid Feburary Early December
  Tahoe City Mid June Mid September
Colorado Denver Late April Early October
  Colorado Springs Early May Early October
  Lakewood Early May Early October
Connecticut Bridgeport Mid April Early November
  Hartford Late April Early October
Delaware Wilmington Mid April Late October
District of Columbia Washington DC Late March Mid November
Florida Jacksonville Late Feburary Early December
  Miami Mid January (only 10% chance of a frost in a given year) Late January (only 10% chance of a frost in a given year)
  Tampa Late January (low chance of a frost) Early January (low chance of a frost)
Georgia Atlanta Late March Mid November
  Columbus Mid March Mid November
  Savannah Early March Late November
Hawaii Honolulu No expected frost No expected frost
  Hilo No expected frost No expected frost
Idaho Boise Mid May Early October
  Idaho Falls Late June Late August
Illinois Chicago Late April Mid October
  Aurora Late April Early October
  Rockford Late April Early October
Indiana Indianapolis Mid April Mid October
  Fort Wayne Late April Mid October
  Evansville Mid April Late October
Iowa Des Moines Mid April Mid October
  Cedar Rapids Late April Early October
  Sioux City Late April Early October
Kansas Wichita Mid April Late October
  Topeka Mid April Mid October
  Olathe Early April Late October
Kentucky Lexington Mid April Late October
  Louisville Early April Early November
  Bowling Green Mid April Late October
Louisiana New Orleans Mid Feburary Mid December
  Baton Rouge Late feburary Late November
  Shreveport Mid March Mid November
  Lafayette Mid Feburary Early December
Maine Portland Early May Early October
  Lewiston Late April Mid October
Maryland Baltimore Mid April Late October
  Rockville Mid April Late October
Massachusetts Boston Early April Early November
  Worcester Late April Mid October
  Lowell Late April Early October
Michigan Detroit Late April Mid October
  Grand Rapids Early May Early October
  Flint Early May Mid October
Minnesota Minneapolis Late April Early October
  St Paul Late April Early October
  Rochester Early May Early October
  Duluth Late May Late September
Mississippi Jackson Late March Early November
  Gulfport Late Feburary Early December
  Biloxi Late feburary Early December
Missouri Kansas City Early April Late October
  Saint Louis Early April Late October
  Springfield Mid April Late October
Montana Billings Early May Early October
  Missoula Late May Mid September
  Great Falls Mid May Late September
Nebraska Omaha Late April Early October
  Lincoln Late April Early October
  Grand Island Late April Early October
Nevada Las Vegas Mid Feburary Late November
  Paradise Valley Mid June Early September
  Reno Late May Early October
  Lovelock Mid May Late September
New Hampshire Durham Mid May Late September
  Nashua Early May Early October
  Hannover Mid May Early October
  Concord Mid May Late September
New Jersey Newark Early April Early November
  Toms River Late April Mid October
New Mexico Albuquerque Mid April Late October
  Santa Fe Early May Mid October
New York New York City Early April Late November
  Long island Late March Mid November
  Ithaca Mid May Early October
  Syracuse Late April Mid October
  Rochester Late April Mid October
  Buffalo Late April Mid October
  Albany Early May Early October
North Carolina Charlottte Late March Early November
  Raleigh Early April Early November
  Durham Early April Late October
  Fayetteville Late March Early November
North Dakota Fargo Mid May Late September
  Bismarck Mid May Late September
  Grand Forks Mid May Mid September
Ohio Columbus Late April Mid October
  Cleveland Late April Late October
  Toledo Early May Early October
  Cincinnati Mid April Late October
Oklahoma Oklahoma City Early April Early November
  Tulsa Late March Early November
  Norman Early April Early November
Oregon Portland Late March Mid November
  Salem Late April Mid October
  Eugene Late April Mid October
Pennsylvania Philadelphia Early April Early November
  Pittsburgh Late April Mid October
  Allentown Mid April Mid October
  Erie Late April Late October
Rhode Island Providence Mid April Late October
  Kingston Early May Early October
South Carolina Columbia Early April Early November
  Charleston Early March Late November
  Greenville Early April Early November
South Dakota Sioux Falls Early May Late September
  Rapid City Early May Late September
  Aberdeen Early May Late September
Tennessee Memphis Mid March Mid November
  Nashville Early April Late October
  Knoxville Early April Early November
  Chattanooga Early April Early November
Texas Houston Early March Late November
  San Antonio Late Feburary Late November
  Dallas Early March Late November
  Austin Mid Feburary Early December
  El Paso Late March Early November
Utah Salt Lake City Mid April Late October
  Ogden Early May Mid October
Vermont Burlington Early May Early October
  Essex Junction Mid May Late September
Virginia Norfolk Mid March Late November
  Richmond Early April Late October
Washington Seattle Early March Mid November
  Spokane Early May Early October
  Vancouver Mid April Mid October
West Virginia Charleston Late April Late October
  Huntington Mid April Late October
  Parkersburg Late April Mid October
Wisconsin Milwaukee Late April Mid October
  Madison Early May Early October
  Green Bay Early May Early October
Wyoming Cheyenne Mid May Late September
  Casper Late May Mid September
  Laramie Early June Mid September

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I hope that you found this guide on Frost Dates for your garden. You may also enjoy my gardening guides on how to attract butterflies to the garden, and Growing Regions and Zones.