It’s not the carbon dioxide

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Coldest Temperatures on Record for Each of 50 States

1875 – 1900: 5 State Records

• 1893 -17° Delaware
• 1899 -2° Florida
• 1899 -16° Louisiana
• 1899 -47° Nebraska
• 1899 -39° Ohio

1901 – 1925: 9 State Records

• 1904 -34° New Jersey
• 1904 -42° Pennsylvania
• 1905 -29° Arkansas
• 1905 -40° Kansas
• 1905 -40° Missouri
• 1912 -40° Maryland
• 1917 -32° Tennessee
• 1917 -37° West Virginia
• 1925 -48° Maine

1926 – 1950: 15 State Records

• 1930 -27° Oklahoma
• 1933 -54° Oregon
• 1933 -23° Texas
• 1933 -50° Vermont
• 1933 -66° Wyoming
• 1934 -51° Michigan
• 1934 -47° New Hampshire
• 1936 -60° North Dakota
• 1936-58° South Dakota
• 1937 -45° California
• 1937 -50° Nevada
• 1940 -17° Georgia
• 1942 -25° Rhode Island
• 1943 -32° Connecticut
• 1943 -60° Idaho

1951 – 1975: 7 State Records

• 1951 -50° New Mexico
• 1954 -70° Montana
• 1966 -27° Alabama
• 1966 -19° Missippi
• 1968 -48° Washington
• 1971 -40° Arizona
• 1971 -80° Alaska

1976 – 2000: 14 State Records

• 1979 +12° Hawaii
• 1979 -52° New York
• 1981 -35° Massachusetts
• 1985 -61° Colorado
• 1985 -34° North Carolina
• 1985 -19° South Carolina
• 1985 -69° Utah
• 1985 -30° Virginia
• 1994 -36° Indiana
• 1994 -37° Kentucky
• 1996 -47° Iowa
• 1996 -60° Minnesota
• 1996 -55° Wisconsin
• 1999 -36° Illinois

Sources:

http://onlyzerocarbon.org/carbon_dioxide.html
http://ggweather.com/climate/extremes_us.htm