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ZoneFahrenheitCelsiusExample Cities
1Below -50 FBelow -45.6 CFairbanks, Alaska; Resolute, Northwest Territories (Canada)
2a-50 to -45 F-42.8 to -45.5 CPrudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
2b-45 to -40 F-40.0 to -42.7 CUnalakleet, Alaska; Pinecreek, Minnesota
3a-40 to -35 F-37.3 to -39.9 CInternational Falls, Minnesota; St. Michael, Alaska
3b-35 to -30 F-34.5 to -37.2 CTomahawk, Wisconsin; Sidney, Montana
4a-30 to -25 F-31.7 to -34.4 CMinneapolis/St.Paul, Minnesota; Lewistown, Montana
4b-25 to -20 F-28.9 to -31.6 CNorthwood, Iowa; Nebraska
5a-20 to -15 F-26.2 to -28.8 CDes Moines, Iowa; Illinois
5b-15 to -10 F-23.4 to -26.1 CColumbia, Missouri; Mansfield, Pennsylvania
6a-10 to -5 F-20.6 to -23.3 CSt. Louis, Missouri; Lebanon, Pennsylvania
6b-5 to 0 F-17.8 to -20.5 CMcMinnville, Tennessee; Branson, Missouri
7a0 to 5 F-15.0 to -17.7 COklahoma City, Oklahoma; South Boston, Virginia
7b5 to 10 F-12.3 to -14.9 CLittle Rock, Arkansas; Griffin, Georgia
8a10 to 15 F-9.5 to -12.2 CTifton, Georgia; Dallas, Texas
8b15 to 20 F-6.7 to -9.4 CAustin, Texas; Gainesville, Florida
9a20 to 25 F-3.9 to -6.6 CHouston, Texas; St. Augustine, Florida
9b25 to 30 F-1.2 to -3.8 CBrownsville, Texas; Fort Pierce, Florida
10a30 to 35 F1.6 to -1.1 CNaples, Florida; Victorville, California
10b35 to 40 F4.4 to 1.7 CMiami, Florida; Coral Gables, Florida
11above 40 Fabove 4.5 CHonolulu, Hawaii; Mazatlan, Mexico