Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Zone 7a

In USDA zone 7a the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C). 4,877 ZIP codes (12.0% of all) are in this zone.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
ZIP codes4,877
Typical last frostApr 16
Typical first frostOct 25

Frost dates vary within zone 7a

For the middle half of zone-7a ZIP codes the last spring frost falls between Apr 9 and Apr 23, and the first fall frost between Oct 21 and Oct 30. The zone measures winter cold, not season length: humid Eastern and dry Western towns in the same zone can be weeks apart. Use your ZIP code for a planting date.

States with zone 7a

Kentucky728 ZIPsPennsylvania613 ZIPsWest Virginia416 ZIPsVirginia386 ZIPsNew Jersey339 ZIPsMissouri311 ZIPsOklahoma179 ZIPsIllinois164 ZIPsKansas162 ZIPsMassachusetts153 ZIPsWashington125 ZIPsConnecticut112 ZIPsNew York109 ZIPsTennessee104 ZIPsMaryland98 ZIPs

Cities mostly in zone 7a

Saint Louis, MO66 ZIPsLouisville, KY65 ZIPsCharleston, WV44 ZIPsHuntington, WV40 ZIPsCleveland, OH40 ZIPsLexington, KY37 ZIPsBoston, MA34 ZIPsWichita, KS32 ZIPsEvansville, IN31 ZIPsNew Haven, CT28 ZIPsSpokane, WA27 ZIPsHarrisburg, PA26 ZIPs

← Zone 6b (colder)Zone 7b (warmer) →

Questions

What is the temperature range of zone 7a?

Zone 7a covers places where the coldest night of an average winter (the annual extreme minimum averaged over 1991–2020) is 0 to 5 °F, or −17.8 to −15 °C.

When is the last frost in zone 7a?

Across ZIP codes in zone 7a, the median last spring frost falls between Apr 9 and Apr 23 for the middle half of places. Zone alone doesn't set the frost date — check your ZIP code.

Which states have zone 7a?

Zone 7a occurs in 34 states; the most ZIP codes are in Kentucky, Pennsylvania, West Virginia, Virginia, New Jersey.

What can I grow in zone 7a?

Perennials, shrubs and trees labeled hardy to zone 7a or a lower (colder) number should survive a typical winter. Annual vegetables depend on frost dates rather than zone.

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.