USDA hardiness zone 5a
In zone 5a the average coldest winter night reaches -20°F to -15°F. Plants labeled for zone 5 (or a colder zone) can survive the winter outdoors here. 126 U.S. cities with 10,000+ residents are in this zone.
| City | State | Zone | Avg. last frost | Avg. first frost |
|---|---|---|---|---|
| Minneapolis | MN | 5a | Apr 23 | Oct 16 |
| Saint Paul | MN | 5a | Apr 24 | Oct 16 |
| Anchorage | AK | 5a | May 1 | Sep 29 |
| Madison | WI | 5a | May 1 | Oct 9 |
| Sioux Falls | SD | 5a | May 1 | Oct 6 |
| Billings | MT | 5a | May 10 | Oct 1 |
| Bloomington | MN | 5a | Apr 23 | Oct 18 |
| Sioux City | IA | 5a | Apr 29 | Oct 7 |
| Brooklyn Park | MN | 5a | Apr 30 | Oct 8 |
| Waterloo | IA | 5a | Apr 27 | Oct 10 |
| Maple Grove | MN | 5a | Apr 30 | Oct 8 |
| Woodbury | MN | 5a | Apr 26 | Oct 12 |
| Eagan | MN | 5a | Apr 23 | Oct 18 |
| Eden Prairie | MN | 5a | Apr 23 | Oct 14 |
| West Coon Rapids | MN | 5a | Apr 30 | Oct 8 |
| Coon Rapids | MN | 5a | Apr 30 | Oct 8 |
| Blaine | MN | 5a | May 5 | Oct 2 |
| Burnsville | MN | 5a | Apr 23 | Oct 18 |
| Casper | WY | 5a | May 10 | Sep 29 |
| Dubuque | IA | 5a | Apr 19 | Oct 21 |
| La Crosse | WI | 5a | Apr 27 | Oct 13 |
| Minnetonka | MN | 5a | Apr 30 | Oct 9 |
| Apple Valley | MN | 5a | Apr 27 | Oct 10 |
| North La Crosse | WI | 5a | Apr 23 | Oct 17 |
| Edina | MN | 5a | Apr 23 | Oct 18 |
| Minnetonka Mills | MN | 5a | Apr 29 | Oct 12 |
| Saint Louis Park | MN | 5a | Apr 29 | Oct 12 |
| Bozeman | MT | 5a | May 26 | Sep 22 |
| Cedar Falls | IA | 5a | Apr 27 | Oct 10 |
| Mankato | MN | 5a | Apr 30 | Oct 9 |
| Maplewood | MN | 5a | Apr 26 | Oct 12 |
| Shakopee | MN | 5a | Apr 23 | Oct 14 |
| Marion | IA | 5a | Apr 28 | Oct 12 |
| Richfield | MN | 5a | Apr 23 | Oct 18 |
| Cottage Grove | MN | 5a | Apr 23 | Oct 19 |
| Roseville | MN | 5a | Apr 28 | Oct 8 |
| Inver Grove Heights | MN | 5a | Apr 24 | Oct 16 |
| Gillette | WY | 5a | May 15 | Oct 1 |
| Bangor | ME | 5a | May 4 | Oct 4 |
| Sun Prairie | WI | 5a | May 1 | Oct 10 |
| Helena | MT | 5a | May 9 | Sep 30 |
| Brooklyn Center | MN | 5a | Apr 30 | Oct 8 |
| Savage | MN | 5a | Apr 23 | Oct 14 |
| Longfellow Community | MN | 5a | Apr 23 | Oct 16 |
| Oakdale | MN | 5a | Apr 26 | Oct 12 |
| Fridley | MN | 5a | Apr 30 | Oct 8 |
| Queensbury | NY | 5a | May 9 | Sep 30 |
| Rexburg | ID | 5a | May 15 | Sep 23 |
| Marshalltown | IA | 5a | Apr 28 | Oct 7 |
| Mason City | IA | 5a | Apr 29 | Oct 7 |
| Winona | MN | 5a | Apr 21 | Oct 19 |
| Watertown | NY | 5a | May 2 | Oct 13 |
| Stevens Point | WI | 5a | May 4 | Oct 7 |
| Superior | WI | 5a | May 6 | Oct 9 |
| Shoreview | MN | 5a | Apr 23 | Oct 20 |
| Chanhassen | MN | 5a | Apr 30 | Oct 9 |
| White Bear Lake | MN | 5a | Apr 23 | Oct 20 |
| Eagle River | AK | 5a | May 9 | Sep 26 |
| Fort Dodge | IA | 5a | Apr 28 | Oct 8 |
| Freeport | IL | 5a | Apr 26 | Oct 13 |
| Norfolk | NE | 5a | Apr 30 | Oct 5 |
| Rock Springs | WY | 5a | May 24 | Sep 24 |
| Champlin | MN | 5a | May 5 | Oct 2 |
| Rosemount | MN | 5a | May 2 | Oct 5 |
| Crystal | MN | 5a | Apr 29 | Oct 12 |
| Farmington | MN | 5a | Apr 27 | Oct 10 |
| Hastings | MN | 5a | Apr 23 | Oct 19 |
| New Brighton | MN | 5a | Apr 28 | Oct 8 |
| Golden Valley | MN | 5a | Apr 29 | Oct 12 |
| Conda | ID | 5a | May 29 | Sep 17 |
| Lino Lakes | MN | 5a | Apr 23 | Oct 20 |
| New Hope | MN | 5a | Apr 29 | Oct 12 |
| South Saint Paul | MN | 5a | Apr 24 | Oct 16 |
| Plattsburgh | NY | 5a | May 6 | Oct 5 |
| Columbia Heights | MN | 5a | Apr 23 | Oct 16 |
| West Saint Paul | MN | 5a | Apr 24 | Oct 16 |
| South Burlington | VT | 5a | Apr 29 | Oct 15 |
| Onalaska | WI | 5a | Apr 23 | Oct 17 |
| Sheridan | WY | 5a | May 21 | Sep 23 |
| Albert Lea | MN | 5a | Apr 27 | Oct 9 |
| Hopkins | MN | 5a | Apr 23 | Oct 14 |
| Anoka | MN | 5a | May 5 | Oct 2 |
| Colchester | VT | 5a | May 2 | Oct 11 |
| Beaver Dam | WI | 5a | May 2 | Oct 9 |
| Rutland | VT | 5a | May 15 | Sep 27 |
| Mitchell | SD | 5a | May 2 | Oct 6 |
| Knik-Fairview | AK | 5a | May 18 | Sep 20 |
| Scottsbluff | NE | 5a | May 8 | Oct 3 |
| Yankton | SD | 5a | Apr 27 | Oct 11 |
| Robbinsdale | MN | 5a | Apr 30 | Oct 8 |
| Hartford | WI | 5a | May 8 | Oct 3 |
| Glens Falls | NY | 5a | May 17 | Sep 29 |
| Sault Ste. Marie | MI | 5a | May 9 | Oct 11 |
| Marshall | MN | 5a | May 5 | Oct 3 |
| Lebanon | NH | 5a | May 9 | Oct 6 |
| Hudson | WI | 5a | Apr 22 | Oct 19 |
| North Mankato | MN | 5a | Apr 30 | Oct 9 |
| New Ulm | MN | 5a | Apr 29 | Oct 7 |
| South Sioux City | NE | 5a | Apr 29 | Oct 7 |
| Waunakee | WI | 5a | May 1 | Oct 10 |
| Vadnais Heights | MN | 5a | Apr 23 | Oct 20 |
| Worthington | MN | 5a | May 3 | Oct 4 |
| Fort Drum | NY | 5a | May 2 | Oct 13 |
| Mounds View | MN | 5a | Apr 23 | Oct 20 |
| Boone | IA | 5a | Apr 28 | Oct 12 |
| Platteville | WI | 5a | Apr 30 | Oct 13 |
| Verona | WI | 5a | Apr 28 | Oct 15 |
| Escanaba | MI | 5a | May 13 | Oct 7 |
| Baraboo | WI | 5a | May 5 | Oct 5 |
| Evanston | WY | 5a | Jun 12 | Sep 12 |
| North Saint Paul | MN | 5a | Apr 26 | Oct 12 |
| Waupun | WI | 5a | May 1 | Oct 11 |
| Mendota Heights | MN | 5a | Apr 25 | Oct 12 |
| Spencer | IA | 5a | May 1 | Oct 3 |
| Saint Peter | MN | 5a | May 2 | Oct 4 |
| Storm Lake | IA | 5a | Apr 25 | Oct 13 |
| Ogdensburg | NY | 5a | Apr 29 | Oct 10 |
| Monroe | WI | 5a | Apr 27 | Oct 14 |
| Vermillion | SD | 5a | May 3 | Oct 3 |
| Portage | WI | 5a | Apr 28 | Oct 10 |
| Cadillac | MI | 5a | May 19 | Oct 1 |
| Little Canada | MN | 5a | Apr 23 | Oct 20 |
| Fairmont | MN | 5a | Apr 25 | Oct 14 |
| Essex Junction | VT | 5a | May 2 | Oct 11 |
| Waverly | IA | 5a | Apr 27 | Oct 10 |
| Oregon | WI | 5a | May 1 | Oct 9 |