Zones / 5b

Zone 5b

In the 2023 PRISM ZIP table, zone 5b is labeled with an average annual extreme minimum of -15°F to -10°F. 2,865 ZIP codes carry that half-zone. USDA’s map page describes these bands as 5°F half-zones inside 10°F zones.

Among cities on this site in this half-zone, the median last 32°F date at each city’s station runs from April 18 to May 14. That is a range across stations, not a zone-wide frost normal. USDA does not publish a single frost date per half-zone.

• Des Moines, IAZIP 50309 · 1 miles from the city point
• Aurora, ILZIP 60505 · 0.3 miles from the city point
• Fort Collins, COZIP 80525 · 1.9 miles from the city point
• Naperville, ILZIP 60540 · 1.4 miles from the city point
• Joliet, ILZIP 60431 · 2.2 miles from the city point
• Rockford, ILZIP 61104 · 1 miles from the city point
• Cedar Rapids, IAZIP 52401 · 1.3 miles from the city point
• Elgin, ILZIP 60123 · 0.7 miles from the city point
• Greeley, COZIP 80634 · 1.5 miles from the city point
• Green Bay, WIZIP 54302 · 1.1 miles from the city point
• Davenport, IAZIP 52806 · 2.5 miles from the city point
• Longmont, COZIP 80501 · 0.2 miles from the city point
• Kenosha, WIZIP 53142 · 1.9 miles from the city point
• Castle Rock, COZIP 80109 · 3.2 miles from the city point
• Loveland, COZIP 80528 · 6.4 miles from the city point
• Rapid City, SDZIP 57701 · 3.6 miles from the city point
• Missoula, MTZIP 59801 · 1.5 miles from the city point
• Schaumburg, ILZIP 60193 · 1.5 miles from the city point
• Ankeny, IAZIP 50023 · 1.6 miles from the city point
• Iowa City, IAZIP 52242 · 0.8 miles from the city point
• Appleton, WIZIP 54911 · 0.4 miles from the city point
• West Des Moines, IAZIP 50265 · 1.6 miles from the city point
• Waukesha, WIZIP 53186 · 2.2 miles from the city point
• Idaho Falls, IDZIP 83404 · 4.5 miles from the city point
• Ames, IAZIP 50012 · 1.5 miles from the city point
• Oshkosh, WIZIP 54901 · 3 miles from the city point
• Janesville, WIZIP 53545 · 4 miles from the city point
• Palatine, ILZIP 60067 · 1.2 miles from the city point
• Cheyenne, WYZIP 82005 · 4.2 miles from the city point
• Parker, COZIP 80134 · 1.6 miles from the city point
• Utica, NYZIP 13501 · 1 miles from the city point
• Council Bluffs, IAZIP 51501 · 1.4 miles from the city point
• West Allis, WIZIP 53227 · 1 miles from the city point
• Wheaton, ILZIP 60187 · 1.1 miles from the city point
• Grand Island, NEZIP 68801 · 3.8 miles from the city point
• Hoffman Estates, ILZIP 60169 · 1.7 miles from the city point
• Plainfield, ILZIP 60544 · 1.8 miles from the city point
• Wauwatosa, WIZIP 53226 · 0.9 miles from the city point
• Urbandale, IAZIP 50325 · 1.9 miles from the city point
• Concord, NHZIP 03301 · 0.5 miles from the city point
• Fond du Lac, WIZIP 54935 · 0.4 miles from the city point
• Burlington, VTZIP 05401 · 1.6 miles from the city point
• Brighton, COZIP 80601 · 0.8 miles from the city point
• Pittsfield, MAZIP 01201 · 1.1 miles from the city point
• Moline, ILZIP 61265 · 0.3 miles from the city point
• Windsor, COZIP 80550 · 1.1 miles from the city point
• Crystal Lake, ILZIP 60014 · 0.3 miles from the city point
• Brookfield, WIZIP 53005 · 1 miles from the city point

Source: PRISM 2023 PHZM ZIP CSV and USDA Plant Hardiness Zone Map.