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Frost dates by state
Alabama
Birmingham (Mar 21) · Huntsville (Mar 24) · Montgomery (Mar 13)
Alaska
Anchorage (May 5)
Arizona
Flagstaff (Jun 4) · Phoenix · Tucson (Feb 5)
Arkansas
Little Rock (Mar 21)
California
Bakersfield · Fresno · Los Angeles · Sacramento (Feb 22) · San Diego · San Francisco · San Jose
Colorado
Colorado Springs (May 3) · Denver (May 5) · Grand Junction (Apr 28) · Pueblo (Apr 30)
Connecticut
Hartford (Apr 21)
District of Columbia
Washington (Mar 24)
Florida
Jacksonville (Feb 25) · Miami · Orlando · Tallahassee (Mar 11) · Tampa
Georgia
Atlanta (Mar 15) · Savannah (Mar 2)
Hawaii
Idaho
Boise (Apr 24)
Illinois
Chicago (Apr 16) · Peoria (Apr 16) · Springfield (Apr 14)
Indiana
Evansville (Apr 4) · Fort Wayne (Apr 24) · Indianapolis (Apr 15)
Iowa
Cedar Rapids (Apr 27) · Des Moines (Apr 18)
Kansas
Topeka (Apr 12) · Wichita (Apr 11)
Kentucky
Lexington (Apr 13) · Louisville (Mar 31)
Louisiana
Baton Rouge (Feb 25) · New Orleans · Shreveport (Mar 9)
Maine
Bangor (May 4) · Portland (Apr 26)
Maryland
Baltimore (Apr 10)
Massachusetts
Boston (Apr 4) · Worcester (Apr 23)
Michigan
Detroit (Apr 20) · Grand Rapids (Apr 29) · Lansing (May 1)
Minnesota
Duluth (May 13) · Minneapolis (Apr 23)
Mississippi
Jackson (Mar 14)
Missouri
Kansas City (Apr 13) · Springfield (Apr 9) · St. Louis (Apr 2)
Montana
Billings (May 4) · Missoula (May 16)
Nebraska
Lincoln (Apr 24) · Omaha (Apr 18)
Nevada
New Hampshire
Manchester (Apr 21)
New Jersey
Newark (Apr 2)
New Mexico
Albuquerque (Apr 6) · Santa Fe (May 4)
New York
Albany (Apr 27) · Buffalo (Apr 24) · New York (Apr 2) · Rochester (Apr 24) · Syracuse (Apr 29)
North Carolina
Asheville (Apr 9) · Charlotte (Mar 30) · Greensboro (Mar 30) · Raleigh (Mar 31) · Wilmington (Mar 19)
North Dakota
Bismarck (May 14) · Fargo (May 10)
Ohio
Akron (Apr 24) · Cincinnati (Apr 18) · Cleveland (Apr 20) · Columbus (Apr 18) · Dayton (Apr 16) · Toledo (Apr 22)
Oklahoma
Oklahoma City (Apr 4) · Tulsa (Mar 31)
Oregon
Eugene (Apr 11) · Medford (Apr 8) · Portland (Mar 13)
Pennsylvania
Allentown (Apr 20) · Harrisburg (Apr 9) · Philadelphia (Apr 2) · Pittsburgh (Apr 23)
Rhode Island
Providence (Apr 11)
South Carolina
Charleston (Mar 7) · Columbia (Mar 25)
South Dakota
Rapid City (May 12) · Sioux Falls (May 1)
Tennessee
Chattanooga (Mar 24) · Knoxville (Apr 1) · Nashville (Mar 31)
Texas
Amarillo (Apr 13) · Austin (Mar 12) · Dallas (Mar 8) · El Paso (Mar 2) · Houston (Feb 13) · Lubbock (Apr 4) · San Antonio (Feb 26)
Utah
Salt Lake City (Apr 8)
Vermont
Burlington (Apr 29)
Virginia
Richmond (Apr 3) · Roanoke (Apr 3) · Virginia Beach (Mar 17)
Washington
Seattle (Mar 2) · Spokane (Apr 26) · Yakima (May 8)
West Virginia
Charleston (Apr 16)
Wisconsin
Green Bay (Apr 30) · Madison (May 1) · Milwaukee (Apr 19)
Wyoming
Cheyenne (May 12)